Choosing the Right Carbide Grade for Wear Components

Materials & Capability — June 2026

Choosing the Right Carbide Grade for Wear Components

The grade on the spec sheet does more for part life than the geometry usually gets credit for — and the wrong grade can fail the same way a good one wears out.

June 16, 2026  •  Georgetown, KY

When a carbide wear component fails early, the first questions are usually about geometry or tolerance — was the bore oversize, was the radius right, did the fit change. Those are reasonable places to start. But a meaningful share of "early wear" complaints we see trace back to something that never shows up on a print at all: the carbide grade itself. Two parts can be identical on paper — same dimensions, same finish, same tolerances — and behave completely differently in service if one is running the wrong grade for its failure mode.

Grade selection doesn't get much attention because it's not usually the customer's job to know it. That's the point of working with a shop that machines to print every day across a range of carbide grades: matching the grade to the application is part of what we do before the first cut, not an afterthought if the part comes back worn out.

What "Carbide Grade" Actually Means

Tungsten carbide isn't one material — it's a family of composites, and two properties do most of the work in deciding how a given grade behaves: cobalt content and grain size. Cobalt is the metal binder that holds the tungsten carbide grains together. More cobalt makes the material tougher and more resistant to chipping and impact, but less resistant to abrasive wear. Less cobalt makes it harder and more wear-resistant, but more brittle under shock loads. Grain size works alongside that: finer WC grain size generally increases hardness and wear resistance at a given cobalt content, while coarser grain size trades some of that hardness for additional toughness.

The Two Numbers That Matter

Cobalt content (by weight): typically ranges from roughly 6% to 16% in the grades we run most. Lower cobalt → harder, more wear-resistant, less tough. Higher cobalt → tougher, more impact-resistant, less wear-resistant.

Grain size: from submicron to coarse. Finer grain → higher hardness and better abrasion resistance. Coarser grain → better fracture toughness for shock-heavy applications.

Every grade is a tradeoff between those two variables, and the "best" grade for a wear component is the one whose tradeoff matches how the part actually fails — not a generic "carbide is carbide" default.

Matching Grade to Failure Mode

We start grade selection by asking how a component is most likely to fail in service, then work backward to the cobalt/grain-size combination that resists that failure mode best:

Abrasive Wear

Sliding contact, particulate, or gritty media

Guides, liners, and feed components exposed to continuous sliding contact or abrasive particulate generally call for lower cobalt content and finer grain size — maximizing hardness, since the dominant failure mode is gradual material loss rather than sudden fracture.

Impact & Shock Loading

Punching, stamping, repeated mechanical shock

Components that see repeated impact — punch tips, certain die details, components in high-cycle stamping operations — often need higher cobalt content and a coarser grain to resist chipping and cracking, even if that means giving up some pure hardness.

Corrosive or Chemical Exposure

Coolant, chemical processing, washdown environments

Standard cobalt binders can be attacked by certain chemical environments over time. For these applications we look at alternative binder systems and grade families that hold up better under chemical exposure without giving up the wear performance the application needs.

Mixed or Unknown Load Cases

Components to print, no service history to draw on

For a genuinely new part — no catalog reference, no failure history — we'll often recommend a mid-range grade as a starting point, then revisit the selection based on how the first run performs in service. Grade selection is iterative when the application is new.

How We Help Customers Specify the Right Grade

Most prints that come to us either specify a grade already, leave it open, or specify a grade that was chosen for a different application years ago and never revisited. In all three cases, we treat grade as part of the conversation, not a box to fill in silently. If a print specifies a grade and the application matches it, we run it as specified. If the application and the grade look mismatched — a high-impact application on a low-cobalt grade, for example — we'll flag it before we cut anything, with our reasoning, so the customer's engineering team can make the call with full information.

Why This Matters for Procurement, Not Just Engineering

Grade selection isn't only a technical detail — it shows up on the documentation side too. The carbide grade used on a job is part of the traceability record we provide, alongside dimensional inspection data and material certifications. If a part is underperforming in service and the root cause turns out to be grade rather than geometry, having that documentation makes it straightforward to identify and correct — without a full redesign, and often without a new print at all. That's the kind of detail that matters less on a one-time purchase and more on a part you're buying again and again for years.

If you've got a wear component that's underperforming, or a print where the grade field has just said "carbide" for longer than anyone can remember, send it our way. We'll look at the application, tell you what grade we'd run and why, and document it so the next run starts from the right answer instead of the same guess.

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Reshoring Isn't About Tariffs. It's About Consistency.

Supply Chain Perspective — June 2026

Reshoring Isn't Really About Tariffs. It's About Consistency.

The tariff landscape keeps shifting. But the companies quietly moving their supply chains domestic aren't doing it because of any single announcement — they're doing it to stop being subject to exit the game.

June 10, 2026  •  Georgetown, KY

Tariff news has been coming fast enough that it's starting to feel like noise. New proposals, comment periods, effective dates that shift, categories that get carved out and added back in. If you've been trying to build a procurement strategy around which rates will actually stick, you've probably noticed that it's a moving target with no clear end point.

That's not an argument for ignoring trade policy. But it is worth stepping back and asking whether the tariff announcements themselves are the whole story — or whether the more durable change is what companies are doing in response to the uncertainty, regardless of where any specific rate eventually lands.

From where we sit in Georgetown, Kentucky, we're watching is the latter. The companies calling us about domestic carbide and tool steel components aren't primarily doing the math on import duties. They're tired of having to do that math at all.

Consistency Is the Rarest Thing in the Supply Chain Right Now

Here's what's been consistent since the tariff situation escalated: nothing. Rates go up, categories get reclassified, trading partners get added to investigations, exemptions get granted and then reversed. For any company running a serious procurement operation, this environment has made offshore sourcing for critical components significantly more complicated — not just more expensive.

Lead time visibility gets harder when your supplier is trying to navigate customs uncertainty. Pricing commitments become softer when your vendor has tariff pass-through clauses in the fine print. Qualification timelines stretch when a supplier relationship that made sense six months ago no longer clears your cost model.

The Honest Take on Tariffs

Will the current tariff rates last? Probably not all of them — trade policy at this intensity rarely holds its exact shape long-term. But the structural disruption to offshore supply chain assumptions has already happened. Companies that have reshored key components aren't likely to reverse course when the next policy swing comes, because the whole point was to stop being exposed to those swings in the first place.

That's the dynamic that's actually driving the reshoring conversation we're seeing. Not panic over a specific tariff announcement, but a quieter recognition that domestic sourcing for critical components is a way to exit a kind of operational uncertainty that isn't going away anytime soon — whatever the specific rate environment looks like in 12 months.

What This Looks Like for Custom Carbide and Tool Steel Components

The supply chain rationalization happening right now isn't limited to commodity parts. We're having reshoring conversations across the full range of what we make: custom carbide wear components, tool steel components to print, carbide punch and die tooling, specialty knives, carbide can tooling, custom profiles and forms that don't exist in any catalog.

These aren't parts that procurement teams were ever sourcing casually. Custom carbide and specialty tool steel components typically carry significant lead times, tight tolerances, and geometry specifications that were developed over years with a specific supplier. The switching costs are real. But the companies evaluating a domestic alternative for these parts aren't doing it to save a few percentage points on landed cost. They're doing it because they want a supplier relationship that doesn't come with geopolitical volatility attached to it.

Carbide Wear Components

Wear pads, guides, liners, bushings, and contact surfaces

Custom ground and EDM-cut to print. Grades selected for the specific wear mechanism — abrasion, impact, or a combination. Common in stamping lines, extrusion equipment, and high-volume material handling applications where offshore lead time unpredictability causes real production risk.

Carbide Punch & Die Tooling

Custom punch, die, and form tooling for precision stamping

Ground and finished to tight tolerances for progressive die and transfer press applications. When a tooling program depends on consistent geometry across a production run, a supplier whose pricing or availability shifts mid-program creates real risk. Domestic production removes that variable.

Specialty Knives & Cutting Components

Carbide knives for aerospace, industrial, and high-speed cutting

Custom geometries for applications where a standard knife doesn't hold up — aerospace trim tooling, industrial slitting, specialty cutting applications with difficult materials or unusual edge geometry requirements. These aren't catalog parts. They're designed to a customer's specific application, and the qualification process with any new supplier takes time.

Carbide Can Tooling

Ironing rings, doming dies, and body maker tooling

High-volume, precision-critical tooling where dimensional consistency across a production lot directly affects output quality. The cost of downtime from an inconsistent lot far exceeds the cost difference between a domestic and offshore source — a calculation that becomes even clearer when offshore lead times are extended by customs uncertainty.

Tool Steel & Specialty Forms

Custom components across carbide and tool steel to print

Not everything that belongs in this supply chain rationalization conversation is pure carbide. Tool steel components with tight tolerances, custom profiles, and specialty surface requirements belong in the same evaluation. If the reason you're looking at domestic sourcing is supply chain stability, it makes sense to look at the full picture of what you're sourcing offshore — not just the carbide line items.

What We Can and Can't Tell You

We're not going to tell you that reshoring is always the right answer for every part, or that domestic sourcing automatically pencils out across your full tooling spend. That's not honest, and you'd know it wasn't.

What we can tell you is that for custom carbide and specialty tool steel components — parts where geometry complexity, tolerance requirements, and application criticality mean you need a supplier you can actually talk to about the details — domestic production in Georgetown, KY removes a category of supply chain risk that the current environment has made harder to ignore. No tariff exposure, domestic traceability, and a supplier relationship where lead times aren't subject to geopolitical variables you can't control.

If you have parts in that category and you've been meaning to get a domestic quote, we're straightforward. Send us the print. We'll tell you what we can do, what it costs, and how long it takes. If it's not in our wheelhouse, we'll tell you that too.

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Carbide vs. Ceramic Can Tooling: Material Selection Guide

Carbide Products, Inc. — Georgetown, KY

Carbide vs. Ceramic Can Tooling: A Procurement Guide to Material Selection and Line Uptime

The tooling material you specify isn't just a cost decision. It's a line uptime decision.

May 27, 2026  ·  Georgetown, KY

Can manufacturing lines don't have a lot of tolerance for error — in either sense of the word. The tooling running your body maker operates at hundreds of strokes per minute, making contact with thin-gauge aluminum on every cycle. When that tooling is off by a few tenths, or when it wears unevenly, you don't just swap a component. You lose line time. And in high-volume can production, downtime is expensive in ways that a tooling invoice rarely captures.

Material selection is where most of that uptime risk lives. Carbide and ceramic are both viable materials for precision can tooling — but they are not interchangeable. Each has a defined range of applications where it performs reliably, and specific conditions where it will underperform or fail early. Understanding the difference before you specify tooling is the difference between a three-month replacement cycle and an emergency order in the middle of a production run.

What the Tooling Is Actually Doing

A can body goes through a series of precisely controlled forming operations between flat aluminum blank and finished container. At each station, tooling is doing work that requires tight geometry, consistent surface finish, and the ability to hold that geometry through millions of cycles without drifting.

The critical tooling stations include blanking and drawing, redrawing, ironing (where the can wall is stretched and thinned to final gauge), doming, flanging, and necking. Each of these operations places different demands on the tooling material. Ironing dies, for example, see continuous sliding contact and high surface pressure. Dome punches see repeated impact loads. Necking tooling requires precise internal geometry with extremely tight tolerances held over long production runs.

The right question isn't "what's the hardest material?" It's "what material performs best at the specific contact condition, pressure, and cycle rate this station demands?"

Where Tungsten Carbide Wins

Tungsten carbide is the workhorse of can tooling. Its combination of hardness, toughness, and compressive strength makes it the right choice for stations that see the highest contact stress and the most demanding wear conditions.

Primary applications for carbide can tooling

Drawing and redraw dies, ironing rings, dome tooling, and flanging tools are typically specified in tungsten carbide. These stations involve sustained contact pressure and benefit from carbide's resistance to abrasive wear and its ability to maintain a polished surface finish over extended production runs.

Grade selection within carbide matters significantly. Cobalt binder content affects the trade-off between hardness and toughness. A lower cobalt percentage increases wear resistance but reduces impact toughness — appropriate for steady-contact operations. Higher cobalt content adds toughness for applications that involve any impact loading. Grain size is a second variable: finer grain carbide supports higher surface finish and holds tighter edge geometry, while coarser grain offers improved toughness for more demanding structural applications.

The practical consequence is that carbide tooling specified without reference to the actual production conditions — grade, geometry, surface finish — may still wear prematurely or fail to hold dimensional accuracy through the expected tool life. This is why CPI works from customer prints and, when needed, from application context rather than a catalog default.

Where Ceramic Can Tooling Has an Advantage

Advanced ceramics — including alumina, silicon nitride, and zirconia-toughened formulations — offer hardness values that exceed tungsten carbide in select applications. In the right conditions, this translates to meaningfully longer tool life and reduced downtime frequency.

Primary applications for ceramic can tooling

Necking dies, certain ironing applications, and tooling for specific aluminum alloys where lubrication conditions are controlled are candidates for ceramic. The key qualifier is that the application involves consistent, steady contact rather than cyclic impact or shock loading.

Ceramic components are more brittle than carbide. That brittleness is not a defect — it's the trade-off for the hardness gain — but it means ceramic tooling requires a controlled environment to realize its longevity advantage. Applications with inconsistent feed, debris in the forming zone, or any real impact loading will see shorter tool life in ceramic than carbide, not longer.

The other consideration is tolerance capability. Precision ceramic grinding requires equipment and process knowledge that not every tooling shop maintains. At CPI, we grind ceramic components on the same precision equipment as carbide, holding the same tolerance standards. This matters because a ceramic component with inconsistent geometry doesn't deliver the surface finish consistency or tool life that makes ceramic worth specifying in the first place.

What to Know Before You Source

When procurement teams contact CPI for can tooling, the conversations that go smoothly share a few things in common. An existing print — or a worn component to measure — gives us the geometry we need to quote accurately. Information about the production environment (material being run, line speed, lubricant system, cycle expectations) helps us recommend the right material specification if the print doesn't call one out.

What helps us quote accurately

A print or sample part, material specification if known, expected cycle life, and whether this is a first-article or repeat production order. If you're replacing tooling that failed early, knowing the failure mode — wear pattern, surface degradation, edge chipping — gives us the information to recommend whether a grade or geometry change is worth exploring.

Domestic sourcing is worth factoring into your evaluation. Lead time on imported can tooling has been a persistent challenge in recent years, and the traceability requirements that automotive-adjacent and beverage customers are increasingly imposing on their supply chains favor domestic production with documented inspection records. CPI manufactures can tooling in Georgetown, Kentucky, ships from domestic inventory, and maintains full dimensional traceability on every component we produce.

If you're evaluating tooling suppliers for a can manufacturing application — whether carbide, ceramic, or still deciding on material — the conversation starts with your print and your production requirements. CPI can help you specify the right material for the right station, manufactured to the dimensional standards your line demands.

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Ready to Source Custom Carbide or Ceramic Can Tooling?

Send us your print. Tell us your production environment. We'll quote the right material for the right station — manufactured and inspected in Georgetown, KY.

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Domestic Carbide Tooling for PCB & Semiconductor Manufacturing | CPI

PCB & Semiconductor Manufacturing | May 20, 2026

When Apple and Nvidia Say "Build It in America," Someone Has to Make the Tooling

How CPI's precision carbide machining, EDM, and grinding capabilities serve PCB assemblers and semiconductor equipment manufacturers across the domestic electronics supply chain.

Georgetown, KY  ·  Carbide Products, Inc.

Apple committed $600 billion to U.S. manufacturing over four years. Nvidia announced $500 billion in domestic AI infrastructure. GlobalFoundries pledged $16 billion to expand semiconductor fabrication capacity on American soil. The announcements keep coming, and the supply chain math behind them is starting to land in procurement departments at every level.

Here's what those headlines don't say: a semiconductor fabrication line — or a PCB assembly line, or an in-circuit test station — is not built from silicon and circuit boards alone. It runs on thousands of precision-machined components: fixture bodies, wear parts, alignment features, probe guides, vacuum seal surfaces, and tooling that holds position to sub-thousandth tolerances through millions of cycles. Before a single chip is produced or a single board is assembled, someone has to make the tooling.

That's where CPI fits into this story.

CPI has served precision-demanding industries — aerospace, medical, automotive — for over 80 years. The capabilities that keep those supply chains running translate directly to PCB assembly and semiconductor equipment manufacturing. This is not a new direction for us. It's the same work, applied to a sector that's now actively looking for domestic suppliers who can deliver.

What PCB Manufacturers Actually Need From a Precision Shop

PCB fabrication and assembly require tight-tolerance carbide tooling and custom fixtures at nearly every stage of production. Most of those components are still sourced overseas — a dependency that's getting harder to justify as lead times stretch and supply chain exposure accumulates.

CPI serves PCB manufacturing across several application areas:

• Wave solder pallets and SMT assembly fixtures Every assembly line requires custom fixtures matched to a specific board's geometry. CPI machines these to ±0.0005" — producing precise board-matching pockets and locating features that maintain dimensional accuracy through thousands of thermal cycles. Prototype-to-production capability covers both NPI and volume runs.
• ICT and functional test fixture components In-circuit test fixtures use spring-loaded probe pins that must contact test points with exact repeatability across 100,000+ insertions. The alignment features, guide pins, and hardened bushings that make this work require positional accuracy that conventional machining can't reliably produce. CPI's Wire EDM holds ±0.00012" (3 microns) — the tolerance this application demands.
• Wear components for PCB equipment Depaneling machines, automated pick-and-place systems, and board-handling conveyors all consume wear parts: guide rails, carbide inserts, nozzle tips, and linear guides. CPI forms and grinds carbide wear components to tight flatness and straightness tolerances, with centerless grinding for cylindrical parts and induction brazing to bond carbide tips to steel bodies cost-effectively.

Semiconductor Fab Equipment: Where the Tolerance Requirements Get Serious

Semiconductor fabrication equipment sits at the top of the precision manufacturing stack. Photolithography systems, CVD reactors, CMP polishing equipment, and wafer-handling systems demand components that other shops routinely decline to quote. Wafer chuck bodies, vacuum seal surfaces, flow control parts, and pressure transducer diaphragms require near-mirror surface finishes, sub-micron dimensional accuracy, and material traceability that most machine shops can't provide.

CPI runs toward this work. A few specific capabilities are worth naming:

EDM threading in carbide and ceramics is a specialty that separates shops capable of semiconductor tooling work from those that aren't. When a component requires threaded features in a hardened or ceramic substrate — and conventional thread-forming would fracture the material or disturb the surface — EDM threading is the only practical method. CPI has the equipment and the process knowledge to do this reliably.

Beyond threading, CPI's sinker EDM holds ±0.0001" on complex internal cavities and seal geometries. Precision grinding produces near-mirror finishes on carbide and hardened steel — the surface quality vacuum seal faces and wafer contact surfaces require. The climate-controlled facility supports dimensional stability during tight-tolerance work. And we can provide serialized inspection reports and material lot traceability documentation that meets semiconductor supply chain requirements.

CPI capability matched to semiconductor fab applications:

• Sinker EDM to ±0.0001" Complex internal cavities, vacuum and flow control geometries, seal features that can't be reached by conventional cutting tools.
• Wire EDM to ±0.00012" (3 microns) Precision cavity tooling, intricate profiled features, through-features in hardened materials — at a tolerance that competes with EDM-specialist shops.
• Near-mirror surface finishing on carbide and hardened steel Wafer chuck surfaces, seal faces, and wafer contact components where surface finish directly affects yield.
• In-house heat treating and brazing Carbide-tipped and bonded assemblies for wear-critical components; hardening after machining for components that need wear resistance without dimensional distortion from outsourced heat treating.
• Serialized QC and material lot traceability Every order includues material lot tracability. We can also provide serialized inspection reports that document the dimensional accuracy of each component — a requirement for many semiconductor supply chains.

The Domestic Sourcing Argument for Electronics Tooling

The same procurement calculus driving the Apple and Nvidia announcements applies at the component and tooling level, just with less press coverage. An ICT fixture made in Taiwan carries the same supply chain exposure as any other import-dependent part — extended lead times, customs uncertainty, and traceability documentation that may not satisfy an OEM's audit requirements. A wave solder pallet from an overseas supplier takes 6–14 weeks to arrive. A fixture issue discovered during NPI can't wait that long.

CPI is in Georgetown, KY. That puts us within logistics reach of Ohio, Indiana, Tennessee, and the broader Midwest electronics manufacturing corridor. Our lead times are often a fraction of what you'd get from overseas suppliers. When a fixture wears out or a board revision requires updated tooling geometry, the conversation happens in a time zone that matches yours.

We're also willing to be honest about fit. If a job doesn't match our capabilities, we'll tell you. What we won't do is quote something we can't deliver. That's been our approach for 80 years — it's not changing because the market is moving in our direction.

How to Start the Conversation

If you're sourcing precision components for PCB assembly equipment, semiconductor fab tooling, or test fixture work — and you're evaluating domestic suppliers — the fastest way to understand fit is to send us a print. We'll review it and give you an honest read on whether CPI is the right shop for the job, what process we'd use, and what the timeline looks like.

No minimum quantities. No boilerplate quoting. A real conversation with engineers who've been solving precision machining problems since 1943.

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Have a PCB or Semiconductor Tooling Project?

Send us your print. We'll tell you exactly what we can do and what the lead time looks like — no minimum quantities, no runaround.

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Carbide Punch and Die Tooling: Specifying for Life

Tooling Engineering  ·  Carbide Products, Inc.

Carbide Punch & Die Tooling:
Specifying for Service Life,
Not Just First Cost

Grade selection, geometry, and tolerance discipline are the variables that separate tooling that runs a million cycles from tooling that fails at fifty thousand.

Georgetown, KY  ·  May 13, 2026

Every stamping engineer has a story about tooling that didn't make it. The punch cracked at the corner radius on the third day of production. The die insert chipped on a burr the setup missed. The first-article parts looked perfect, and by ten thousand cycles the feature had drifted outside tolerance. These aren't failures of machining skill — they're usually failures of specification. The wrong material, the wrong geometry, or an inadequate tolerance on a feature that had to hold under real production conditions.

Carbide punch and die tooling is not immune to these failures, but it changes the math significantly. When specified correctly — right grade, right geometry, tolerances that reflect the actual demands of the application — carbide tooling routinely achieves ten to forty times the service life of equivalent tool steel tooling in high-cycle stamping environments. When specified incorrectly, carbide's brittleness makes failures faster and more dramatic than anything tool steel would have produced.

This post covers how to get the specification right.

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Why Carbide in High-Cycle Stamping

Tungsten carbide's advantages in punch and die applications are well established: hardness in the range of 1,400–1,800 HV (compared to roughly 740–900 HV for the best tool steels), exceptional wear resistance, and the ability to hold a sharp cutting edge through far more cycles than any metallic alloy. In high-volume stamping — blanking, piercing, fine blanking, progressive die work — these properties translate directly into longer runs between regrind, fewer die changes, and lower cost per stamped part.

The tradeoff is toughness. Carbide is stiffer and more brittle than tool steel. It does not deflect gracefully under overload — it fractures. This means carbide tooling demands more from the press setup, the die clearance, and the part geometry specification than equivalent tool steel tooling would. The engineering work done before the tool is made determines whether carbide's advantages are realized or its brittleness shows up in production.

A useful framing: in a well-specified carbide punch and die application, the tooling should outlast every other consumable in the die. If you're replacing punches before you're replacing the die block, shims, lifters, or die shoe, the tooling specification is worth revisiting.

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Grade Selection: The Foundation of the Specification

Tungsten carbide tooling is not a single material. Grades vary primarily by cobalt binder content and WC grain size, and these two variables drive a direct tradeoff between hardness and toughness. Understanding where your application sits on this tradeoff is the most consequential decision in the specification process.

Low Cobalt (3–8% Co) — High Hardness Grades

Fine grain, very high hardness (1,600–1,800 HV). Best choice for fine blanking and precision piercing of thin, soft materials where cutting edge retention is the primary requirement. Limited toughness — not appropriate for applications with shock loading, interrupted cuts, or misalignment risk. Chipping and fracture are the failure modes when these grades are used outside their design envelope.

Medium Cobalt (10–15% Co) — General Purpose Grades

The workhorse of carbide punch and die tooling. This range provides the best balance of wear resistance and toughness for most stamping applications: medium-gauge sheet metal, stainless steel blanking, and progressive die work where punches may see some lateral load. Most custom carbide punch and die work is specified in this range.

High Cobalt (16–25% Co) — Tough Grades

Lower hardness but substantially improved impact and fracture resistance. Appropriate for heavy blanking of thick or high-strength material, applications with significant shock loading, or geometries — long slender punches, thin webs — where brittleness failure is a primary concern. Also used in forming applications where the tool needs to absorb deformation energy without fracturing.

CPI works with customers to match grade selection to the documented demands of the application: material thickness, tensile strength, press speed, punch geometry, and expected cycle count. There is no universal right answer, and a grade that performs well in one application will fail in another that looks similar on paper.

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Geometry: Where Most Carbide Punch Failures Begin

Carbide's brittleness concentrates stress at geometric discontinuities. This is not a design flaw to be worked around — it's a physical property to be designed for. The geometry of a carbide punch or die insert must be specified with this in mind.

Corner radii are the most common failure point. Internal corners — any place where two surfaces meet at an angle — are stress concentration sites. In carbide tooling, an internal corner with no specified radius is not just a drafting convention, it's a crack initiation site. Most carbide punch geometries require a minimum corner radius on the print. What that radius should be depends on the cobalt grade, the cross-section geometry, and the load environment — but zero is almost never the right answer, regardless of what the stamped part geometry would otherwise call for.

A key specification question that customers often don't think to ask: what is the corner radius on the punch shank where it transitions to the cutting head? If this transition is a sharp step, it's a fracture site under bending load. A blended radius here — even a small one — significantly improves punch life in applications where the punch sees any lateral force during the cut.

Land and clearance specifications also matter more with carbide than with tool steel. The die clearance — the gap between punch OD and die bore — must be tightly controlled. Insufficient clearance increases lateral loading on the punch during cutting, concentrating bending stress in the shank. Excessive clearance produces a drawn edge rather than a sheared edge, causes the punch to seek the center of the die bore on each stroke (introducing fatigue loading), and degrades part quality. The correct clearance for a given application depends on material thickness, tensile strength, and the type of cut — and it should be specified on the die drawing, not left to the die shop's default practice.

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Tolerancing Carbide Punch and Die Sets

Carbide punch and die tooling is typically ground to close tolerances — surface ground for flatness and thickness, OD ground for punch diameter, and ID ground or wire EDM'd for die aperture. The tolerances achievable in carbide grinding are tight: ±0.0001" on diameter, ±0.0001" on flatness, surface finish below Ra 16 µin as a practical standard.

The question is which dimensions require that precision, and which don't. Over-specifying tolerances on features that don't functionally require them drives cost without improving performance. Under-specifying on features that do matter — punch-to-die clearance, flatness of the seating surface, perpendicularity of the punch OD to the shank face — produces tooling that performs poorly regardless of how well it was manufactured.

Tolerance callouts that are commonly under-specified on carbide punch and die prints:

Perpendicularity of the Cutting Face to the Punch Axis

If this relationship is not called out, each supplier will hold whatever their equipment produces by default. A punch that is slightly out-of-square to its axis produces an uneven cut and applies lateral load at a consistent clocking position every stroke — exactly the fatigue loading pattern that causes early shank fractures.

Flatness of the Die Seating Surface

A die insert that rocks on its seat — even a few tenths — concentrates load at the high point on every stroke. This is a common contributor to edge chipping on carbide die inserts in progressive die applications where the die block sees repeated impact.

Surface Finish on the Cutting OD

Carbide's hardness means surface finish on the cutting OD is a wear and friction specification, not just cosmetic. A poorly finished punch OD increases friction during the cut, adds lateral loading during extraction, and can gall against the die bore in tight-clearance applications. Ra 16 µin or better is the practical standard for carbide punch ODs in stamping applications.

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What CPI Brings to Carbide Punch and Die Work

CPI has been manufacturing precision carbide components to customer print for over 80 years. Our punch and die tooling work is not catalog-based — every component is manufactured to the dimensions, grade, and surface finish specified on the customer's print, with the process experience to flag when a specification is likely to cause problems before the tool is made.

Our process combines CNC grinding, surface grinding, and wire EDM for profiles that require it, with CMM inspection on critical dimensions. We work in the full range of WC-Co grades and can advise on grade selection for customers developing a new application or respecifying existing tooling that's underperforming.

If you're sourcing carbide punch and die tooling for a new program, dealing with premature tool failures in an existing application, or transitioning from tool steel to carbide and want to understand what changes in the specification — send us your print and we'll take a look.

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Have a Punch or Die Application
That Needs Precision Carbide?

Send us your print and we'll put a quote together. Custom carbide punch and die tooling — to your specification, made in Georgetown, KY.

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How to Source a Part That Doesn't Exist

Sourcing Guide · Carbide Products, Inc.

How to Source a Part That Doesn't Exist in Any Catalog

Whether you're starting from a print, a worn-out part, or a description of what you need — here's how to find a domestic manufacturer who can actually make it.

May 6, 2026  ·  Georgetown, KY

Most industrial buyers know this moment well. You need a wear component, a die insert, a guide, a profile — something specific to your machine, your line, or your application. You call your distributor. They search the catalog. They come back with some version of the same answer: "We don't carry that" or "That would be a special order" or simply silence.

It's not that your part is unusual. It's that parts like yours — application-specific, dimensionally precise, built to perform one job on one line — were never catalog items to begin with. They never will be. They exist because someone made them, to a specific print, for a specific purpose.

Finding the right manufacturer for that work is a different process than sourcing from distribution. This post walks through how it works — including two common starting points — and why the current manufacturing climate has made domestic to-print sourcing easier and more important than it's been in years.

Why These Parts Aren't in Any Catalog

Catalogs exist to solve a volume problem. A distributor stocks parts that enough customers will need, in standard dimensions, so inventory can be managed profitably. That model works well for fasteners, bearings, and general wear stock.

It breaks down for precision components that are purpose-designed for a specific application. A carbide wear pad ground to a proprietary profile for a particular stamping line. A ceramic die insert dimensioned to a customer's part geometry. A tungsten carbide guide bushing with a bore and OD tolerance that reflect 30 years of process refinement at one plant. These parts aren't in catalogs because they belong to you — your application, your print, your performance specification.

The right question isn't "who carries this part?" It's "who can make this part?" Those are different phone calls — but the second one is usually more straightforward than buyers expect.

To-print manufacturers like CPI exist specifically for this work. The entire business model is built around receiving a customer's specification — whether that's a formal engineering drawing or a physical sample — and producing parts that meet it exactly, with full documentation.

Two Starting Points, One Process

Most requests for to-print precision components come from one of two places. Both lead to the same outcome.

You Have a Print

A dimensioned drawing — even a PDF, a hand sketch, or a CAD file — is all a to-print manufacturer needs to get started. Submit it with your material specification, required tolerances, and quantity. The manufacturer reviews it for manufacturability, quotes it, and produces to your exact dimensions. If there's a question about the print, a good manufacturer calls you before cutting anything.

You Have the Old Part

Prints go missing. Machines outlive their documentation. Original suppliers go out of business. When the only reference you have is the worn-out part itself, a capable manufacturer can reverse engineer, and produce replacements — sometimes improving on the original in the process. This problem is much more common than many realize.

Learn about CPI's reverse engineering process →

In either case, the conversation starts the same way: a description of what you need and whatever reference material you have. No formal procurement process required to get an initial quote. No minimum order. No need to fit your part into someone else's catalog.

What Materials and Parts Can Be Sourced This Way

To-print manufacturing covers a much broader range of materials and part types than many buyers realize. At CPI, that includes carbide wear components — wear pads, guides, liners, bushings, and wear inserts used in stamping, forming, and high-cycle industrial applications. It includes punch and die tooling, carbide and ceramic can tooling, specialty carbide profiles produced via precision grinding and Wire EDM, and precision components to print across a range of materials and geometries.

If it requires tight tolerances, a specific material, or a geometry that doesn't come off a shelf, it's a candidate for this sourcing path. The question to ask is not "is this a standard part?" — it almost certainly isn't — but rather "can I describe what this part needs to do and what dimensions it needs to hold?" If yes, a to-print manufacturer can work with you.

One of the most common conversations CPI has with new customers goes like this: "We've been buying this part from the same place for fifteen years, they closed down, and nobody else has it." That's exactly the situation to-print manufacturing exists to solve.

Why Domestic Sourcing Matters More Right Now

The trade policy shifts of 2025 and 2026 have changed the calculus for precision component sourcing in ways that are still working through supply chains. Procurement teams that built their supplier base around overseas carbide and specialty components — often drawn by lower unit prices — are now navigating a very different landscape: longer lead times, tariff cost exposure, and in some cases, suppliers who simply can't hold tolerances consistently under the volume pressure of a reshoring-driven market.

For application-specific precision components, the case for domestic sourcing was always stronger than the unit price comparison suggested. Documentation, traceability, communication, and the ability to work directly with the manufacturer on a tolerance issue or an emergency replacement order — none of these are easy to maintain across a 14-week international supply chain.

CPI has operated in Georgetown, Kentucky for over 80 years. Every component we ship can come with full material certifications and dimensional documentation if needed. When something needs to change on a print or a delivery needs to move up, you call us directly. That's not a marketing claim — it's the practical reality of working with a domestic manufacturer at this scale.

The reshoring conversation happening at the OEM and Tier 1 level right now is, in many ways, a rediscovery of what domestic to-print manufacturers have always offered: reliability, traceability, and a supply chain you can actually see.

How to Get Started

The fastest path to a quote is straightforward. If you have a print, submit it with your material and tolerance requirements and a note on quantity and timing. If you have the physical part and no print, ship it — or send clear dimensional photos and your best description of the application — and we'll measure and quote from there. If you have neither and are starting from scratch on a new design, that's a conversation worth having early, while material selection and geometry are still flexible.

What you don't need is a formal approved vendor process, a purchasing account, or a perfectly complete drawing package. Most of the best sourcing relationships start with an imperfect RFQ and a phone call. We've been doing this for over 80 years. We know how to work with what you have.

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Have a Part That Needs to Be Made, Not Found?

Send us your print, your sample part, or just a description of what you need. CPI's team will review it and get back to you with a quote — no formal vendor process required to get started.

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Grinding for Precision Components

Precision Grinding · Carbide Components

When the Tolerance Can't Be Machined

For precision components where surface finish and dimensional accuracy define whether a part performs or fails, precision grinding isn't the last step — it's the one that matters most.

Carbide Products, Inc. · Georgetown, KY · April 29, 2026

There is a tolerance threshold where conventional machining operations — milling and turning — reach their practical limit. Below that threshold, precision grinding takes over. For carbide components, that handoff is not a contingency. It is part of the process.

Carbide is among the hardest industrial materials in commercial use. That hardness is the point — it's what makes a carbide wear pad outlast a steel equivalent by an order of magnitude, or what keeps a carbide knife edge consistent through hundreds of thousands of cycles. But hardness is also what makes carbide unforgiving. You cannot come back to a carbide part with a file or a polishing cloth and expect to move the number. Once it's ground, it's ground. Which means the grinding operation has to be right the first time.

This post covers what precision grinding actually does for carbide components, when it should be specified, and what to expect in terms of dimensional and surface finish outcomes.

Why Forming Operations Alone Don't Get You There

Carbide blanks — whether pressed and sintered, cast, or produced via powder metallurgy — come out of the blank stage with dimensional tolerances that are intentionally generous. Sintering shrinkage is not perfectly uniform. Press geometry can vary from piece to piece. The blank is designed to be finish-processed to print, not to be used from the blank stage.

Wire EDM can hold tighter tolerances than sintering and is excellent for complex profiles — but EDM also leaves a recast layer at the surface, a thin zone of metallurgical disruption that affects surface integrity in high-stress or high-wear applications. For parts where surface integrity is a specification requirement — aerospace tooling, precision wear pads in a rolling-contact application, carbide knives running against abrasive materials — grinding is typically required after EDM to remove the recast layer and reach the final surface specification.

Key Principle

Precision grinding is not a corrective operation. It is a planned step in the manufacturing sequence. If your carbide component requires dimensional tolerances tighter than ±0.0005" or surface finishes below Ra 32 µin, grinding should be designed into the process plan from the beginning — not added at the end.

What Precision Grinding Achieves for Carbide

The practical outputs of precision grinding on carbide components fall into three categories:

Dimensional Control

Tight tolerances on critical features

Surface grinding, cylindrical grinding, and centerless grinding can routinely hold ±0.0002" to ±0.0004" on carbide. For some applications, tighter is achievable depending on part geometry and setup stability.

Surface Finish

Finish to Ra 8–16 µin or finer

Precision grinding can achieve surface finishes in the Ra 8–16 µin range as a standard output. Lapping or superfinishing after grinding can reach Ra 4 µin and below where contact surface geometry demands it.

Parallelism & Flatness

Geometric accuracy across a surface

Surface flatness and parallelism on carbide wear pads, liners, and guide components are critical to load distribution. Precision grinding controls these geometric tolerances in ways that sintering and EDM cannot.

Edge Geometry

Controlled edge preparation

For carbide knives and cutting inserts, grinding defines the edge geometry — relief angle, clearance angle, edge sharpness — that determines cutting performance and edge life in production.

When Precision Grinding Should Be Specified

Not every carbide component requires grinding as a finishing step. Many wear pads and liner components in moderate-tolerance applications run fine off sintered or EDM dimensions. The cases where grinding is necessary fall into a predictable set of conditions:

Tolerances tighter than ±0.005". Below this threshold, sintered carbide will not be consistent enough. Wire EDM can get much closer, but surface integrity requirements often preclude using EDM as the final operation.

Surface finish specifications below Ra 32 µin. Carbide components running in contact-sliding applications — wear pads against guide rails, bushings in precision bores, knives against substrates — require surface finishes that control friction and wear behavior. Ra 32 µin is the rough threshold where grinding becomes the appropriate process.

Post-EDM recast layer removal. When Wire EDM is used to produce complex carbide profiles, the recast layer at the cut surface should be removed by grinding if the component will be subjected to cyclic stress, high contact loads, or applications where surface cracks from the recast zone could initiate failure.

Flatness and parallelism requirements on wear surfaces. If your carbide wear pad or liner has a flatness or parallelism callout on the drawing — as opposed to just a thickness tolerance — grinding is almost certainly the required process to meet it.

How to Specify Grinding on Your Print

If precision grinding is required for your hardened or carbide components, it is important to clearly define the requirements on your print. A few specific things that help:

Call out the surface finish requirement on the relevant surfaces using a standard roughness symbol and Ra value. Don't leave it as a note in the title block. If the finish matters on a specific face, mark it on that face.

Apply geometric tolerances — flatness, parallelism, perpendicularity — as direct feature callouts using GD&T. A thickness tolerance alone does not control flatness. These are different specifications and they need to be stated separately.

If the part requires grinding on some surfaces but not others, a process note helps: "Grind surfaces A, B, C to print. All other surfaces: as-sintered/as-EDM." This prevents a shop from applying grinding uniformly where it isn't needed — and adding cost accordingly.

Specify the final state of the part. If PVD coating follows grinding, note the pre-coat inspection requirement. The more the print communicates about the intended process sequence, the cleaner the result.

CPI's team reviews drawings before quoting and will flag specification gaps. But a complete print produces a more accurate quote, a cleaner process plan, and fewer conversations before first article.

Precision grinding is one of those operations that is treuly necesary for many precision applications. A correctly ground carbide wear pad arrives flat, dimensionally correct, and ready to install — and runs as expected. The work that went into making it right doesn't show. That's how it's supposed to be.

If you have hardened steel or carbide components with tight dimensional or surface finish requirements, or if you've had parts come back from other suppliers that weren't ground where you expected them to be, CPI's grinding capabilities might suprise you — and it's worth a conversation.

Custom Carbide · Precision Grinding

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Send us your print. CPI's grinding team reviews tolerances and surface finish requirements before quoting — so you get an accurate answer, not an estimate.

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Carbide Wear Components: Why Parts Fail Early

Carbide Products, Inc. — Technical Insight

Carbide Wear Components: Why Your Parts Are Wearing Out Faster Than They Should

Premature wear is rarely bad luck. More often, it's a specification problem — and one that starts with the substrate but doesn't end there.

April 2026  ·  Carbide Products, Inc.  ·  Georgetown, KY

When a carbide wear component fails before it should, the conversation usually starts with these questions. How long did it last? What did the wear surface look like when it came out? Was the failure abrupt or gradual?

What that conversation is really about, is the specification that produced the part in the first place. Carbide is an exceptionally capable material, especialy for wear applications — hardness values in the 85–93 HRA range, compressive strength that outperforms virtually every alternative, and the ability to maintain precise dimensions through millions of cycles. But those properties only translate into long service life when the grade, geometry, surface condition, and — increasingly — the coating are matched to what the application actually demands. Get any of those wrong, and a component that should run for years fails in months.

Here's what we look at when a customer comes to us with a wear problem, and what typically explains why the previous component didn't perform.

The Four Failure Modes We See Most Often

Most premature carbide wear component failures trace back to one of the same four root causes. They're all preventable at the design and specification stage.

Failure Mode 01

Wrong Grade for the Wear Environment

Carbide grades vary significantly in hardness, toughness, and wear resistance. A grade optimized for pure abrasion — fine grain, high cobalt — may crack under impact loading. A grade optimized for impact toughness may abrade faster than the application demands. Grade selection has to start with the specific wear mechanism, not a general-purpose specification.

Failure Mode 02

Surface Finish Mismatched to the Contact Condition

Rough surfaces accelerate adhesive wear. Too smooth a surface on the wrong material pairing can increase friction and heat buildup. The right surface finish is determined by what the component contacts, at what speed, and under what load — not a default Ra callout on a drawing.

Failure Mode 03

Geometry That Concentrates Stress

Sharp internal corners, abrupt cross-section transitions, and thin sections that weren't analyzed for the actual load path are common culprits in carbide component fracture. Carbide doesn't redistribute stress the way steel does. Geometry has to be designed with that brittleness in mind.

Failure Mode 04

Dimensional Variation Between Production Lots

A wear component that performs well on first article and inconsistently in production is almost always a manufacturing consistency problem. Dimensional drift between lots changes the fit — and the fit changes the wear dynamic entirely.

The Coating Layer: When Surface Engineering Extends What Carbide Already Does Well

Properly specified carbide is an excellent wear substrate. But for applications that push the limits of what the carbide surface alone can handle — high sliding speeds, corrosive environments, extreme temperatures, or adhesive wear against difficult mating materials — a PVD hard coating applied after grinding can meaningfully extend service life beyond what the substrate achieves on its own.

This is where our partnership with Dayton Coating Technologies comes in. We work with them on carbide wear components where the application warrants it, combining precision-ground geometry and grade selection from our Georgetown shop with their PVD coating capabilities in Dayton, Ohio.

Coating Partner

Dayton Coating Technologies

Dayton Coating Technologies has been an industry leader in PVD coating and surface engineering for over 35 years, serving aerospace, automotive, tool & die, medical, and beverage manufacturing. Their in-house capabilities include surface preparation, edge prep technology, and a full range of PVD hard coatings applied through a quick-turn process — a combination that complements CPI's precision carbide grinding without adding unnecessary lead time to the production cycle, allowing coating to be treated as part of the process rather than a bottleneck.

The coating selection for a carbide wear component depends on the same environmental analysis that drives grade selection — but it addresses different failure mechanisms. Where grade selection governs bulk wear resistance and fracture toughness, coating selection governs surface hardness, friction coefficient, thermal stability, and corrosion behavior. The two decisions work together, and making them independently often means leaving performance on the table.

Here's a practical reference for how the most common PVD coatings map to wear application demands:

Coating	Best Suited For	Key Property
TiN	General wear resistance, light abrasion, tool & die	Proven baseline hardness; broad compatibility
TiCN	Sliding wear, moderate impact, steel contact	Higher hardness than TiN; improved adhesive wear resistance
AlTiN	High-temperature applications, aerospace, dry environments	Exceptional oxidation resistance above 800°C; very high hardness
AlTiSiN	Extreme wear environments, hardened mating surfaces	Nanocomposite structure; among the highest hardness in the PVD range
AlCrN	High-heat wear, corrosive environments, interrupted contact	Superior thermal stability and oxidation resistance; tough under cycling
ZrN	Corrosive or food-contact environments, medical, beverage	Excellent chemical resistance; low friction; biocompatible

What the Right Specification Actually Looks Like

When we design a carbide wear component, the process starts with the environment, not the print. The print defines the geometry — but the environment defines the material and coating decisions, and those need to happen in the right order.

• What is the primary wear mechanism? Abrasion from hard particulate, adhesive wear against a mating surface, erosion from a fluid or slurry, or impact loading — each demands a different carbide grade and coating response.
• What is the operating temperature? Cobalt-bonded carbide grades retain hardness to several hundred degrees, but applications with significant thermal load or cycling may benefit from AlTiN or AlCrN coatings that add oxidation resistance at the surface.
• What does the mating material look like? The hardness, surface finish, and lubrication state of whatever the component contacts directly affects both grade selection and the most effective coating choice.
• Is there a corrosive or chemical element to the environment? Carbide resists most common industrial fluids well, but applications involving acidic environments, food contact, or biological exposure may warrant a ZrN or specialized coating to protect the cobalt binder and the ground surface.
• What does the replacement cycle look like today? If a customer can tell us how long the current component lasts and what the wear surface looks like when it's pulled, we can often identify exactly which property is being exhausted — and whether the fix is in the substrate, the coating, or both.

On Lead Time and Regrind

Standard production carbide wear components ship in 3–5 weeks from print approval. When a PVD coating is specified, we coordinate with Dayton Coating Technologies to sequence the coating step after final grinding — typically adding a short window to the standard timeline without significantly extending total lead time.

We also design for regrind where the geometry supports it. A carbide wear component that can be returned to dimensional spec through surface grinding — and then recoated — extends service life significantly and reduces the total cost per cycle over the component's operational lifetime.

If a Wear Component Is Failing Before It Should

Premature wear rarely has a mysterious cause. The answer is almost always revealed in the mode of failure — what the wear pattern looks like, where it concentrated, and how quickly it progressed. If you have a component that isn't performing to expectation, bring us the part history and the print. We'll tell you what we see and whether a specification change — in the substrate, the coating, or both — is likely to solve it.

We've been grinding carbide to tight tolerances in Georgetown, Kentucky for over 80 years. The wear component conversations we have most often aren't about what carbide can do in general — they're about what the right grade, the right geometry, and the right coating can do for a specific application. That conversation is worth having before your next production run.

Have a Wear Problem?

Bring Us the Part History. We'll Find the Answer.

Send us your print, your current replacement cycle, and what the failure surface looks like. We'll tell you what we think is driving it — and what a fully-specified replacement looks like.

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The True Cost of Imported Carbide Tooling in 2026

The Section 232 tariff rate on steel, aluminum, and copper derivatives went to 25% flat on April 2, 2026. If you're still running the tooling budget you built in January, the math has changed — and not by a small amount.

This isn't a post about trade policy. It's a practical breakdown of what imported carbide tooling actually costs right now, once you account for everything that doesn't show up on the quote.

We're a domestic precision machine shop in Georgetown, Kentucky that specializes in carbide machining. We have a direct stake in this conversation, and we'll say so plainly. But we'll also give you the honest comparison — because the decision isn't always as simple as "buy American." Sometimes it is. Sometimes the math is more nuanced. You deserve a clear picture of both.

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What's Actually in the Tariff Stack Right Now

As of April 2, 2026, Section 232 duties apply a flat 25% tariff on steel, aluminum, and copper derivatives, following the Supreme Court's February 2026 ruling that struck down the broader IEEPA-based tariff structure. For carbide tooling, which typically incorporates tungsten carbide grades bonded with cobalt — often sourced from Chinese or European suppliers — the downstream cost impact is real and compounding.

Here's where it stacks:

• Raw material tariffs: Tungsten carbide feedstock and cobalt binder often pass through tariffed supply chains before they ever reach a tooling manufacturer. An overseas tooling supplier absorbs some of this — but not all of it passes through at cost.

• Section 232 duty on finished imports: When the finished tool ships to a U.S. buyer, it's subject to applicable Section 232 or Section 301 duties depending on country of origin. For tooling from China, Section 301 duties (often 25%) layer on top.

• Currency and freight volatility: Fuel surcharges, container costs, and exchange rate swings add 3–8% to international shipments in a typical quarter — more during disruptions.

• Lead time buffer inventory: To absorb longer international lead times (typically 6–14 weeks for specialty carbide tooling vs. 2–4 weeks domestic), procurement teams carry safety stock. That working capital has a carrying cost.

The number that looked competitive in a January purchase order may have quietly become significantly less competitive by Q2, once those variables resolve.

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The Costs That Don't Appear on the Quote

Tariff exposure is the most visible cost, but it's rarely the only one procurement teams undercount when comparing domestic and imported tooling.

Lead Time Risk

A precision carbide tool from an overseas supplier typically requires 6–14 weeks from order to delivery for anything outside their standard catalog — sometimes longer for specialty or custom geometry work. Domestic carbide machining shops running similar complexity can typically turn custom orders in 2–5 weeks.

The cost of lead time isn't just scheduling inconvenience. It's the cost of carrying extra inventory, the risk of a production stoppage if a tool fails and the replacement lead time is 10 weeks, and the loss of flexibility when a customer's program changes mid-run.

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Quality Traceability

Aerospace and defense customers — and increasingly automotive Tier 1s — require full material traceability on tooling. That means certifiable documentation of carbide grade, cobalt content, binder composition, and heat lot. Domestic manufacturers can typically provide this in-house. International supply chains often cannot provide the same level of documentation continuity, particularly when material passes through multiple processors before reaching the tooling manufacturer.

If your customer base includes any defense, aerospace, or medical work, tooling traceability isn't optional — and it should factor into your true cost calculation.

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MOQ Rigidity

Overseas tooling suppliers frequently require minimum order quantities that make economic sense for their production runs but not for yours. A domestic shop can often run 5–15 pieces on a custom geometry where an overseas supplier requires 50 or more. For specialty or short-run tooling, the MOQ mismatch alone can make domestic sourcing the lower total cost — even before you account for tariffs or lead time.

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Supplier Risk in a Volatile Policy Environment

The tariff landscape has shifted twice in the past year — Liberation Day in April 2025, the Supreme Court ruling in February 2026, and the Section 232 reset in April 2026. Procurement teams that built supply chains assuming stable tariff rates have had to recalculate, twice. That policy risk has a real value: it's the cost of being exposed to decisions you can't control. Domestic sourcing eliminates that exposure.

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What Domestic Carbide Machining Actually Looks Like in Practice

At Carbide Products, Inc., we precision machine carbide through the use of grinding, and EDM. The work we do comes out of Georgetown, Ky every week this includes:

• Custom carbide tooling and wear parts held to tolerances of ±0.0005" and tighter

• Specialty geometries — form tools, step drills, custom profiles — that standard catalogs don't carry

• Repeat production runs with documented lot traceability for aerospace and automotive customers

• EDM threading and machining of carbide and other hardened/exotic materials

• Lead times on custom work typically in the 2–5 week range, depending on complexity and queue

We're not trying to compete with a commodity imported carbide insert on price. That's not what we do and it's not who we serve. What we offer is carbide machining and tooling capability that requires engineering judgment, tight tolerance control, and a supplier who will be on the phone with you when something needs to change mid-run.

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When Imported Tooling Still Makes Sense

In the interest of being straight with you: imported carbide tooling continues to make sense in certain situations. For high-volume, commodity-grade inserts and standard geometry tooling where catalog availability, scale, and unit price are the primary drivers — and where traceability requirements are low — an overseas catalog supplier may still be the right call.

Where the calculus has shifted: anything custom, anything traceable, anything where lead time is a competitive constraint, and anything where total landed cost in 2026 looks materially different than it did in 2024.

If you're running specialty or custom carbide tooling, or if your supply chain had you re-quoting imported tooling after Liberation Day — that's worth a second look at domestic options.

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A Practical Starting Point

Before the next purchase order on imported tooling, it's worth running a simple comparison:

• What is the unit price after applicable tariffs?

• What is the lead time, and what does safety stock cost to cover it?

• Does this supplier meet your customer's traceability requirements?

• What is the MOQ, and does it match your actual usage?

• What is the risk cost if this supplier is unavailable for a quarter?

If you've run that comparison recently and domestic still doesn't pencil — fair enough. If you haven't run it since 2024, it's likely worth the hour.

We're happy to quote against your current supplier. If the numbers work, great. If they don't, we'll tell you that too.

Carbide Products, Inc. — Georgetown, KY

Ready to Compare? Submit an RFQ.

Send us a drawing or describe your tooling need. We'll quote it straight — lead time, price, and capability — so you have a real domestic comparison to work with.

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Precision CNC Turning: What to Expect on Lead Times, Tolerances, and Getting Parts Made Right

If you're quoting precision turned parts and your current supplier just told you eight weeks, it's worth asking whether that's a machining constraint — or just a supplier backlog. Here's what precision CNC turning actually looks like when things are running well.

Turning is one of the most common operations in a machine shop — and one of the most frequently misquoted. Lead times vary wildly between suppliers not because the work is dramatically different, but because capacity, scheduling, and process capability aren't evenly distributed across shops. If you're sourcing turned parts and you've been accepting long lead times as the norm, it may be worth revisiting that assumption.

At Carbide Products, Inc., our lathe department turns a wide range of materials and geometries — from simple shafts and bushings to complex multi-diameter parts with threading, grooving, and close-tolerance OD and ID requirements. This is a breakdown of what to expect when precision turning is done right: tolerances, lead time drivers, material considerations, and how to set up an RFQ that comes back fast and accurate.

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What Precision CNC Turning Covers

CNC turning produces cylindrical or round parts by rotating the workpiece against a stationary cutting tool. A modern CNC lathe can handle a wide range of features in a single setup or across multiple operations:

• Outside diameters (OD) and inside diameters (ID) — the core of most turned part geometry

• Facing and length control — squaring ends and holding overall part length to print

• Threading — external and internal threads in standard or custom pitches

• Grooving and undercutting — for snap rings, O-ring seats, relief features

• Tapers and contours — including multi-step diameters and radius blends

• Boring — accurate ID features that can't be drilled or reamed to tolerance

• Parting — cutting finished parts to length from bar stock

Many turned parts also move to secondary operations after the lathe — cylindrical grinding to hit tighter tolerances, EDM for features that can't be cut conventionally, or induction brazing if the part is a carbide-tipped tool body. Knowing what secondaries the job requires is important for getting an accurate quote and realistic lead time.

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Tolerance Ranges You Can Realistically Expect

CNC turning is a capable process, but tolerance expectations need to match the process. Here's a practical breakdown:

Standard CNC Turning

A well-maintained CNC lathe running a stable process can hold ±0.001″ to ±0.002″ on diameter and length dimensions for most materials and part geometries. For simple, rigid parts in free-machining materials, ±0.001″ is routine. As part complexity increases — longer length-to-diameter ratios, thin walls, interrupted cuts — the achievable tolerance typically relaxes.

Precision Turning

With careful setup, ideal tooling, controlled cutting parameters, and in-process gauging, CNC turning can hold ±0.0005″ on OD and ID features in favorable conditions. This is achievable but requires more attention at the machine and typically adds some cycle time for verification.

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When Cylindrical Grinding Is the Right Next Step

When OD tolerances tighter than ±0.0005″ are required — or when the surface finish specification is critical — the turned part moves to cylindrical grinding. Grinding can reliably hold ±0.0001″ to ±0.0002″ on diameter and produce surface finishes well below that of a lathe. The cost and lead time addition is real, but so is the capability improvement. If your print calls for tight diameters and a ground finish, grinding isn't optional — it's just the right process sequence.

If you're unsure whether your tolerances require grinding or can be held in the turning operation alone, that's a good question to raise with your shop at the RFQ stage. Any shop quoting precision turned parts should be able to give you a clear answer.

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Materials That Turn Well — and a Few Worth Mentioning

Machinability varies significantly across materials, and it affects both the quality of the finished part and the time required to produce it.

Materials That Turn Cleanly

• Free-machining steels (12L14, 1215, 1144) — the easiest to turn; chip well, hold tolerances predictably, good surface finish with minimal effort

• Aluminum alloys (6061, 7075) — machine quickly and cleanly; surface finish is typically excellent

• Brass and bronze — free-cutting, produce excellent finishes, good for bearing surfaces and fluid components

• Low-carbon and alloy steels (1018, 4140 annealed) — very workable; 4140 in pre-hardened condition requires more attention to tool selection and cutting parameters

Materials That Require More Attention

• Stainless steels (303, 304, 316, 17-4) — work-harden under the tool; require sharp edges, consistent feeds, and attention to chip control. 303 is the most machinable; 316 and 17-4 are more demanding

• Titanium alloys — low thermal conductivity means heat concentrates at the cutting edge; requires sharp tooling, adequate coolant, and conservative speeds

• Inconel and nickel alloys — demanding to machine; work-hardening is aggressive and tool life is short. These are legitimate turning jobs but require the right shop with appropriate experience

• Hardened steels (above ~40 HRC) — standard turning tools are not effective above a certain hardness threshold; these parts typically need grinding rather than turning as the primary material removal process

When quoting turned parts, always include the material grade and hardness (if applicable). "Steel" or "stainless" without the alloy and condition leaves the shop making assumptions that can lead to inaccurate pricing or a part that doesn't machine as expected.

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What Actually Drives Lead Time for Turned Parts

Lead time on precision turned parts is shaped by a handful of factors — most of which have nothing to do with how long it takes to actually run the part.

Shop Capacity and Scheduling

The biggest variable in lead time at most shops is queue depth — how many jobs are ahead of yours waiting for the same machines. A shop running at high capacity will quote longer lead times simply because that's when your job will reach the machine, regardless of cycle time. A shop with available capacity on the lathe can often turn the same part in a fraction of the calendar time.

Material Procurement

If the shop needs to order material for your job, procurement lead time is added to the front of the schedule. Jobs running in common materials that most shops stock — 1018, 4140, 6061, 303 stainless — can often start sooner. Specialty alloys, close-tolerance bar, or certifiable material may add days or weeks to the schedule depending on availability.

Setup and Programming

For a new job, the shop needs to write or verify the CNC program, set up tooling and work holding, and run first-off parts before production begins. For simple, repetitive geometries this is minimal. For complex parts with multiple setups, special tooling, or tight-tolerance features requiring qualification, setup time is real and needs to be factored into the schedule.

Secondary Operations

If the part requires grinding, EDM, heat treat, plating, or other operations after turning, each adds time and potentially a handoff to a different department or outside vendor. Knowing what secondaries are required at the quote stage lets the shop plan the full routing — and give you a lead time that reflects the complete job, not just the turning operation.

Quantity

Setup time is largely fixed — whether you're running 5 parts or 500, the machine setup is similar. Small quantities carry proportionally higher setup cost and can feel slower relative to part count. Larger runs, once set up, can often be quoted with aggressive per-piece pricing.

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What to Include in Your RFQ for Turned Parts

A complete RFQ leads to a faster, more accurate quote — and fewer surprises once the job is underway. For precision turned parts specifically, here's what matters most:

• Current revision drawing with all dimensions, tolerances, and notes — the drawing is the foundation; everything else is context

• Material grade and condition — alloy designation, temper or hardness if applicable, and whether material is customer-supplied or shop-supplied

• Critical features clearly identified — call out the dimensions that matter most to function; this guides process planning and inspection priority

• Quantity — quote quantity plus annual usage if known; a shop prices a 10-piece prototype very differently than a 500-piece annual release

• Surface finish requirements — specify Ra or Rz if it matters; "as machined" is fine when it is, but don't leave a critical sealing surface undefined

• Secondary operations — heat treat, plating, laser marking; list anything that needs to happen after the lathe

• Inspection and documentation requirements — first article inspection, material certs, dimensional reports, certificate of conformance

• Desired delivery date — or whether timeline is flexible; gives the shop context to schedule accurately

The more complete your RFQ, the more accurately the shop can price and schedule the job. Incomplete RFQs lead to either inflated quotes (the shop builds in uncertainty) or quotes that miss real cost drivers — neither of which serves you well.

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Getting Parts Right the First Time

Precision turning isn't complicated in principle — the physics of the process are well understood. What separates a good turned part from a bad one is process discipline: sharp tooling, proper feeds and speeds, proper work holding, in-process gauging, and a shop that understands what the part is actually for.

At Carbide Products, Inc., our lathe department runs precision turned work for customers in automotive, industrial tooling, aerospace, and general manufacturing. We're straightforward about what we can hold, what requires grinding, and where a job fits into the current schedule. If you've got round work that needs a reliable source — whether it's a new job or a part you've been sourcing elsewhere — we're happy to take a look.

Precision Turning — Georgetown, KY

Ready to Quote Your Turned Parts?

Send us your drawing, material, quantity, and timeline. We'll give you a straight answer on tolerances, lead time, and what the job requires.

SUBMIT AN RFQ

What Makes a Good RFQ for Precision Machined Parts?

When a customer sends out a request for quote, everyone wants the same thing: a fast, accurate quote and a smooth path to production.

But the quality of the RFQ has a huge impact on both.

A strong RFQ helps a machine shop understand exactly what the part needs, what matters most, and where potential issues may exist before work ever begins. A weak RFQ can lead to delays, questions back and forth, inaccurate pricing, and surprises once the job is underway.

If you are sourcing precision machined parts, tooling, carbide components, or tight-tolerance work, here is what makes an RFQ more useful for both your team and your manufacturing partner.

Start With a Clear Print or Part Drawing

The most important part of any RFQ is the drawing.

A complete, readable print gives the shop a foundation for quoting the part correctly. This should include all critical dimensions, tolerances, material requirements, finishes, thread details, and any notes that affect manufacturing.

If you have a 3D model, send that too. A STEP file or similar model can help clarify complex geometry, but it should support the drawing rather than replace it unless both parties are aligned on model-based definition.

At minimum, your RFQ should include:

• a current revision drawing

• clear dimensions

• tolerance requirements

• material callout

• any special notes tied to manufacturing or inspection

If multiple revisions are floating around internally, make sure the correct one is the one being quoted.

Clearly Identify Critical Features

Not every dimension matters equally.

One of the biggest ways to improve an RFQ is to identify the features that are truly critical to function. That may include a tight diameter, a ground surface, a sealing face, a positional tolerance, or a feature that mates with another part in an assembly.

When a shop knows what is most important, it can make better decisions during quoting and process planning. It also helps avoid over-processing non-critical features, which can drive cost up unnecessarily.

If certain dimensions are especially important, call that out directly in the print or in the RFQ notes.

Specify the Material — and Be Precise

“Steel” is usually not enough.

Material selection changes tooling, cycle time, heat treat needs, grind requirements, and overall quote accuracy. If the part calls for carbide, hardened tool steel, stainless, aluminum, or a specialty alloy, that should be clearly stated up front.

Helpful material details include:

• exact material grade

• hardness requirements

• whether material is customer-supplied or shop-supplied

If there is flexibility in the material, that is useful to mention as well. In some cases, a shop may be able to suggest an equivalent or more machinable option depending on the application.

Include Quantities and Expected Release Pattern

A quote for 2 pieces is not the same as a quote for 200.

The quantity you need affects setup cost, cycle time assumptions, inspection planning, fixture choices, and whether a process is practical at all. It also helps the shop determine whether this is a prototype, short-run, or production opportunity.

Be clear about:

• quote quantity

• annual usage if known

• whether this is a one-time order or repeat work

• whether multiple releases are expected

Even a rough forecast is better than none. A shop can price more intelligently when it understands the bigger picture.

Call Out Surface Finish, Coating, and Secondary Operations

Many RFQs leave out details that end up being major cost drivers.

If the part needs grinding, EDM, laser marking, coating, plating, passivation, heat treat, brazing, assembly, or other secondary work, include that up front. These are not minor details. They can change both routing and lead time.

The same goes for cosmetic expectations and surface finish requirements. If a finish matters, define it. If it does not, that is also useful to know.

The more complete the scope is at quote stage, the better the quote will reflect reality.

Share the Timeline Honestly

Lead time matters, but context matters too.

If you need a part urgently, say so. If you are still budgeting for a future release, say that too. A good manufacturing partner can usually respond better when it understands the business need behind the request.

Helpful timeline details include:

• desired delivery date

• whether the job is urgent, standard, or flexible

• whether partial shipments are acceptable

A realistic timeline helps prevent rushed assumptions and opens the door to better communication.

Mention Inspection or Certification Requirements

For precision machined parts, documentation can be just as important as the part itself.

If you require first article inspection, material certs, dimensional reports, special packaging, traceability, or any industry-specific documentation, include that in the RFQ.

These requirements affect the quote and should not be an afterthought.

Some common callouts include:

• first article inspection report

• material certifications

• certificate of conformance

• in-process or final inspection records

• traceability requirements

• special packaging or labeling

If the part is going into a regulated or high-risk application, that is worth noting as well.

Explain the Application When It Matters

A shop does not always need to know exactly where the part is used, but a little context can go a long way.

Knowing whether a part is part of a cutting tool, fixture, wear component, aerospace assembly, industrial machine, or prototype can help a manufacturer better understand what matters most. That can influence recommendations around tolerancing, material choice, manufacturability, and risk.

You do not need to over-explain. Just enough context to guide smart decisions.

Include Contact Information for Questions

Even a strong RFQ may raise a few questions.

The fastest way to keep things moving is to include the name and contact information of the person who can answer technical or commercial questions quickly. Waiting days for clarification slows down quoting and production planning.

A simple point of contact helps keep the job from stalling before it starts.

What Slows Down a Quote?

Some of the most common RFQ issues are simple but costly:

• missing drawings

• unclear revisions

• incomplete material callouts

• no quantity listed

• no tolerance guidance

• secondary operations not mentioned

• no clear contact for follow-up questions

None of these automatically kill a job, but they do make it harder to provide an accurate quote quickly.

A Good RFQ Leads to a Better Manufacturing Outcome

A well-built RFQ does more than help a shop price the job.

It improves communication, reduces assumptions, speeds up review, and increases the chances of getting parts made right the first time. For precision machined components, especially those involving tight tolerances, carbide, grinding, EDM, or multiple operations, clarity early on pays off.

The best RFQs are not necessarily the longest. They are the clearest.

If your team has a print, a part model, or even an early concept that needs review, sending complete information up front is the best way to start the conversation.

Need help reviewing a part for manufacturability or quoting? Send us your drawing, quantity, material, and timeline, and we can help you evaluate the next step.

Carbide Products’ Role In The 150th Kentucky Derby

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A valued customer and close friend, Peter Pickett of Pickett Blackburn was given the opportunity to manufacture the bugles for the 150th running of the Kentucky Derby. The craftsmanship and quality of their work is truly unmatched. We are proud to supply them with the specialty tooling and parts needed to make these world class instruments.

More information can be found on their site PickettBlackburn.com

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Carbide Products, Inc has been working with Pickett Blackburn on several projects over the years. We have been able to provide them with specialty reamers used to manufacture high end mouthpieces. We also machine the monel valve bodies used on their three valve instruments like those shown above. Our team is proud to have a part in a project like this.

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Leveraging the Restoration of a Studer S145 CNC Machine: A Strategic Move by Carbide Products, Inc.

At Carbide Products, Inc., we understand the pivotal role of technology in driving manufacturing excellence. Our recent endeavor to restore a Studer S145 CNC machine exemplifies our commitment to innovation and strategic investment. In this blog post, we delve into the significance of restoring this precision grinder and how it serves as a proof of concept for future advancements at Carbide Products, Inc.

Cost-Effective Investment

For Carbide Products, Inc., restoring the Studer S145 CNC machine was a strategic investment in cost optimization. Instead of acquiring a new grinder, we are leveraging the potential of existing legacy equipment. This approach is allowing us to control upfront costs while evaluating the feasibility of upgrading our grinding capabilities.

Skill Development and Training

The restoration project has served as an opportunity for skill development among our team members. Our technicians gained practical expertise in CNC machine refurbishment, deepening their understanding of machine mechanics and maintenance. This knowledge empowers our workforce to maximize the value of our equipment effectively.

Proof of Concept for Future Investments

Restoring the Studer S145 CNC machine is serving as a proof of concept for future investments in manufacturing technology at Carbide Products, Inc. By revitalizing this equipment, we are demonstrating the tangible benefits of upgrading our machining capabilities. This proof of concept guides our strategic decisions regarding future CNC machine acquisitions.

Commitment to Sustainability

At Carbide Products, Inc., sustainability is integral to our operations. The restoration of the Studer S145 CNC machine aligns with our commitment to eco-friendly practices. By extending the lifespan of our equipment, we contribute to reducing electronic waste and minimizing our environmental footprint.

Conclusion: Shaping the Future of Manufacturing

In conclusion, the restoration of our Studer S145 CNC machine represents another step forward in our journey towards manufacturing excellence at Carbide Products, Inc. This initiative underscores our dedication to innovation, cost optimization, skill development, and sustainability. Moving forward, we are poised to leverage this experience to inform our future investments in CNC technology, ensuring that we continue to deliver exceptional quality and value to our customers.

At Carbide Products, Inc., we are excited about the possibilities that lie ahead. Contact us today to learn more about our capabilities and how we can support your manufacturing needs with precision and expertise.

DATRON Dynamics, Inc. features Carbide Products, Inc. in recent article

German machine tool manufacturer Datron Dynamics features Carbide Products, Inc. in a recent article by Steve Carter.  

In late 2016 CPI took delivery of one of the first Datron Neo Machines in the US.  After learning of our unique application of Datron's cutting edge technology, Datron contacted Paul Strippelhoff and asked if they could feature CPI in one of their corporate news letters.  Of course Paul agreed...  In producing the article Paul had the oportunity to highlighted two of our rising machinsts, Evan Strippelhoff (Danny's son) and Peyton Strippelhoff (Paul's son).  

Read the full article: http://www.datron.com/blog/small-cnc-investment-yields-huge-advancement/ 

Manufacturing Today Magazine publishes article on Carbide Products, Inc.

Manufacturing Today Magazine, winter 2012 issue features Carbide Products, Inc. in a spotlight article entitled "SKILLED AND MOTIVATED".  The article, written by Staci Davidson highlights our history and business philosophy of continuous improvement as well as our ongoing investment in equipment, technology and personnel.  There are also photos, one depicting a capping mechanism used at J.M Smucker’s Jif® peanut butter plant in Lexington, KY and another depicting an array of pencil manufacturing cutters, cutter heads, material and related tooling produced in our Georgetown, KY plant. 

Thanks also go out to Dan Leech of Leech Carbide for his support in the production of the article.   

Please read the complete article “Skilled and Motivated”

EDM Threading, Carbide and Hardened Metals

Carbide Products, Inc. is proud to announce the addition of EDM threading to our long list of capabilities.  EDM threading is the best, most economical and, sometimes, only way of putting a threaded hole in cemented carbide, ceramics, hardened steel or other materials when tight tolerances and precision are required.

We utilize our Charmilles Model HD-20 High Speed Hole Drill to burn a start hole in the material.  Then employing our Erowa electrode holders and management system fabricate tap drill electrodes and threading electrodes.  Threading electrodes are matched to each other and timed to allow for multiple rough and finish die sinking routines on one of our Agie-Charmilles CNC sinker EDM’s.  The resulting precision is extraordinary. 

The advantages of EDM threading over conventional tapping methods include, but are not limited to, the following:

• It will not disturb or distort surfaces adjacent to the tapped hole during the tapping process. (Ideal for thin wall and exotic materials found in medical instruments as well as cemented carbides and ceramic where there is not sufficient material to allow for invar plugs or in the event a threaded feature is added after sintering.)

• Makes repairing a tapped hole in a hardened or carbide tool a breeze.

• Tapping steel after it has been hardened improves the quality of the hole when there is concern with distortion in heat-treating.

• Adding a tapped hole to a hardened tool after a redesign or forgetting to do so in the first place becomes exponentially easier.

• Process does not involve displacing material but burning it which results in ability to hold tighter tolerances and sharper threads.

We are currently threading holes in multiple sizes of solid carbide grinding spindles but have ability to thread very small sizes from 2mm up to a reasonably large size hole.  Your application is our challenge.

Please allow Carbide Products, Inc. to become the source for all of your EDM Threading needs!