First Article Inspection & PPAP for Precision Components

Quality & Qualification

What Your First Article Report Should Actually Tell You

A First Article that passes isn't the same as a process that repeats. Here's what a PPAP or AS9102 submission is really supposed to prove — and what to look for before a program goes to volume.

Georgetown, KY

A First Article Inspection gets treated, more often than not, like a box to check before a program can move forward. The part gets measured, the report gets stamped, the PO gets released. That's not wrong, it's just missing the point of why the requirement exists in the first place. A First Article isn't there to prove that one good part came off the machine. It's there to prove that the process behind it will keep producing that part, correctly, at volume, months and revisions from now.

That distinction matters more on precision work than almost anywhere else. There's no catalog part to fall back on and no prior production history to lean on the first time a print runs. The First Article is often the only data point a buyer has before committing to a full production quantity.

PPAP and AS9102 Aren't the Same Form

Automotive programs generally call out PPAP — Production Part Approval Process, built around the AIAG framework, with up to eighteen elements depending on submission level, from design records and process flow diagrams to control plans and measurement system analysis. Aerospace programs call out AS9102 First Article Inspection, structured around three forms: a part number accountability record, a product accountability record tying every characteristic on the print to a measured value, and a characteristic accountability record showing where each requirement is verified. The paperwork looks different. The underlying question is identical: can this specific process, on this specific tooling, produce this specific part to print, repeatably.

Worth being direct about here: CPI isn't IATF 16949 or AS9100 registered. Most of the customers who require PPAP or AS9102 documentation are — it's their quality system setting the requirement, and it reaches us as a submission format their supplier list calls for, not a certification we're claiming for ourselves.

A Common Misconception

A First Article that passes tells you a part was made correctly once. It doesn't tell you the process will hold unless the report also documents the fixturing, the work instructions, and the inspection method well enough that a second operator, on a second shift, could reproduce the same result. A report that's just a dimensional layout with passing numbers is only half the story.

Four Things a First Article Report Should Actually Show You

Before signing off on a First Article and releasing volume, these are the things worth confirming are actually in the report — not assumed.

01 — Full Dimensional Coverage

Every characteristic on the print, measured and recorded — not a sample.

A First Article is a 100% layout by definition. If a characteristic is missing from the report, it hasn't actually been verified, regardless of what the summary page says.

02 — Material Traceability

Certification tied to a specific heat or lot, not a generic spec reference.

On carbide and specialty alloys in particular, material certs need to trace back far enough to confirm the grade and condition actually used, not just the grade called out on the print.

03 — Process Documentation

Fixturing and work instructions detailed enough to reproduce the result.

If the only person who can make the part correctly is the one who ran the First Article, the process isn't actually qualified — it's dependent on one operator's memory.

04 — Revision-Level Sign-Off

Approval tied to a specific print revision, not "current print."

A First Article approved against Rev C doesn't cover Rev D. Sign-off that doesn't name a revision level creates ambiguity the next time the print changes.

When a First Article Should Be Revisited

The obvious trigger is a new part number. The less obvious ones are just as important: a tooling change, a material substitution, a new operator or shift running the job for the first time, a supplier change anywhere upstream in the material supply chain, or a long gap in production that leaves a question about whether the original setup still exists exactly as documented. Any of those resets the question a First Article is meant to answer. Treating it as a one-time event at program launch, rather than a checkpoint that gets revisited when something upstream changes, is where a lot of First Article programs quietly stop doing their job.

At CPI, First Article and PPAP submissions get built the same way regardless of whether a customer requires full documentation or a simpler dimensional report: full print coverage, material certs traced to heat and lot, and process documentation specific enough that the part can be reproduced by someone other than whoever ran it first. That's not extra paperwork for its own sake — it's the same discipline that makes a custom part something you can actually plan volume production around.

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Have a Program That Needs a First Article Done Right?

Send us the print and the submission requirement — PPAP, AS9102, or your own internal format. We'll tell you exactly what the report will include before the first piece is cut.

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Carbide Laser Marking & Lot Traceability

Quality & Traceability — July 2026

Traceability Starts Before the Part Starts — It Ends With What's Marked On It

A lot code stamped into the wrong area can ruin a part before it ever leaves the shop. Here's how marking is actually done right.

July 7, 2026  •  Georgetown, KY

When a carbide wear component or knife blade fails in the field, the first question from a quality team is rarely "what happened?" It's "which lot, which heat, which work order?" If the part can't answer that question on its own, the investigation stalls, the whole affected lot gets treated as suspect, and a single-part failure turns into a full-PO containment exercise. That's the practical cost of a traceability gap, and it's decided at the marking step — long before anyone is asking questions about a failure at all.

Most procurement specs treat marking as a checkbox: "part shall be identified per print." What that line item doesn't say is how you're supposed to put a permanent, legible identifier on a material that's harder than the tool you'd normally use to stamp it — without cracking it.

Why Mechanical Marking Doesn't Work on Carbide

Steel components get stamped, engraved, or vibro-etched without much thought, because steel deforms locally around the marking tool. Carbide doesn't deform — it's a sintered, brittle material, and any mechanical marking method that relies on impact or point pressure risks introducing a micro-crack at exactly the spot where the identifying mark lives. On a wear component or a knife edge, that's not a cosmetic risk. It's a stress riser sitting on a part that's about to go into a high-cycle, high-load application.

That's why every carbide part we mark for lot or serial identification goes through non-contact laser marking, not a stamp, punch, or vibro-etch tool. A fiber laser removes a controlled, microscopic layer of material to leave a permanent mark with zero mechanical force on the part — no risk of the crack initiation that a physical marking tool can leave behind on a brittle substrate.

Three Facts About Laser Marking Carbide

Zero contact force: the beam never touches the part, so there's no mechanical stress and no crack-initiation risk on a brittle substrate.

Deep enough to survive, shallow enough to be safe: the mark can hold through grinding, coating, and years of service — without cutting deep enough to weaken the surrounding material.

What Actually Gets Marked

"Identify per print" usually resolves into a specific combination of the following, and the right combination depends on the customer's quality system, not on what's convenient for us to apply:

Lot & Heat Code

Ties the finished part back to raw material certification

Connects a specific part to the material batch or carbide powder lot and press/sinter batch it came from — the record a materials review board asks for first when a failure investigation opens.

Part Number & Drawing Revision

Confirms the part in hand matches the print on file

On a made-to-print component with no catalog equivalent, the revision letter is what confirms a part built eighteen months ago still matches the current engineering baseline.

Date Code & Work Order

Narrows a containment action to the parts that actually need it

If one work order shows a deviation, a legible date/work-order mark is what keeps containment scoped to that lot instead of every part shipped that quarter.

2D Data Matrix, Where Specified

Machine-readable traceability for high-volume automotive programs

Tier 1 and Tier 2 automotive programs increasingly want a scannable code rather than a human-readable string alone — we mark to whichever format the customer's own system requires.

Where This Stops Being Optional

For aerospace work under AS9100-flowed requirements, and for automotive components flowing down under IATF 16949, full lot traceability isn't a nice-to-have — it's a contractual condition of supply. A supplier who can't produce a part-to-lot-to-material-cert chain on request isn't a supplier those primes and Tier 1s can keep using, regardless of how good the part itself is. The same logic applies, quietly, to carbide tooling and wear components: when a customer's own end product gets recalled, the first thing their engineering team needs is a fast, accurate answer about which of our lots are actually implicated.

Because CPI builds every part to a customer's print rather than to a catalog, there's no default serialization scheme we fall back on. The marking spec gets built into the job the same way the tolerance and material grade do — as a print requirement, not an afterthought applied at the end of the run.

What to Send Us

If your print already specifies a marking standard, lot-traceability format, or a customer-flowed quality requirement, send it along with the part drawing and we'll quote it as specified. If it doesn't yet, and you're not sure what your own quality system or your customer's PPAP requirements actually call for, tell us the industry and the end application — we'll tell you what's typically required and what we'd recommend marking on the part itself.

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Need Full Lot Traceability For Your Parts?

Send us the print and your quality requirements — we'll quote the part and the marking spec together, not as an afterthought.

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Carbide Profiles | Custom Geometry to Print

Precision Capabilities · Georgetown, KY

Specialty Carbide Profiles: When the Drawing Calls for Something No Catalog Can Provide

How Wire EDM and precision grinding combine to produce complex carbide geometries — and why most shops won't quote them.

July 1, 2026 · Carbide Products, Inc.

Every so often, a print lands in a purchasing manager's inbox that stops the sourcing process cold. The geometry is unusual. The tolerances are tight. The material is carbide. And every shop they call gives the same answer: we don't run that.

At Carbide Products, Inc., those are often the prints we look forward to most.

Specialty carbide profiles — custom cross-sections, non-standard shapes, and precision-ground geometries that exist nowhere in any catalog — represent one of CPI's core capabilities. They're the parts that require a combination of deep material knowledge, multi-process machining, and the willingness to take on what other shops turn away.

What Makes a Carbide Profile "Specialty"?

Standard carbide components — round rods, flat wear plates, standard drill blanks — can be sourced from any number of distributors. Specialty profiles are something different entirely. These are components defined entirely by a customer's engineering drawing: a unique cross-sectional shape, a specific material grade, a tight dimensional tolerance that doesn't correspond to any off-the-shelf geometry.

Common examples include:

Custom Wear Profiles

Non-standard guide rails, wear liners, and contact surfaces machined to a precise customer geometry — often in grades optimized for abrasion or corrosion resistance.

Formed Tool Bodies

Complex cross-sections used as die inserts, forming profiles, or specialized cutting edges that require a specific relief angle, rake, or contour that no standard blank provides.

Precision Carbide Blanks

Customer-specified blanks in custom lengths, thicknesses, or shapes — ground to tolerance — that serve as the foundation for proprietary tooling systems.

Multi-Feature Profiles

Parts that combine multiple machined features — flats, radii, slots, or steps — in a single carbide component that would require multiple separate parts if sourced from catalog stock.

What each of these has in common: they exist only on the customer's drawing. CPI works from that drawing — not from what we happen to keep in inventory.

The Two Processes That Make Complex Profiles Possible

Producing specialty carbide profiles at the precision levels industrial and aerospace customers require demands specific capabilities. At CPI, two processes are central to this work: precision grinding and Wire EDM.

Precision grinding is CPI's primary tool for achieving tight dimensional tolerances on carbide surfaces. Unlike softer metals, carbide cannot be machined with conventional cutting tools — its extreme hardness requires abrasive grinding with properly dressed wheels and careful process control. CPI's grinding capability covers surface grinding, cylindrical grinding, and form grinding, allowing us to hold tolerances in the tenths on carbide components that other materials wouldn't demand.

Wire EDM opens the door to profile shapes that grinding alone cannot produce. Wire Electrical Discharge Machining removes material through controlled electrical erosion — no cutting force, no mechanical stress on the workpiece — making it uniquely suited to carbide. Complex contours, internal features, and tight-radius geometries that would chip or fracture under conventional machining are well within reach of Wire EDM. The process is slow by conventional standards, but it's capable of tolerances and geometries that no other process can match in carbide.

The combination of precision grinding and Wire EDM is what separates specialty carbide profile work from general machining. Each process contributes something the other cannot — and knowing when to use each, and in what sequence, is where engineering expertise becomes the deciding factor in part quality.

Why Most Shops Turn This Work Away

If you've ever sent a specialty carbide profile RFQ to five shops and gotten three no-quotes back, it's not a coincidence. There are real reasons this work is selectively quoted.

First, carbide tooling requires dedicated equipment. Grinding wheels and parameters that work for steel are not appropriate for carbide. Wire EDM flushing and cutting parameters have to be dialed for carbide's specific conductivity and thermal properties. Shops without deep experience in carbide-specific process parameters will either decline or produce out-of-tolerance parts.

Second, specialty profiles carry engineering risk. When a part doesn't exist in any catalog, there's no reference point. The shop has to interpret the drawing, select the right material grade, determine the appropriate machining sequence, and build in inspection checkpoints — all without a prior run to draw from. That requires both capability and confidence.

Third, the economics don't work for most general job shops. Specialty carbide profiles are often low-volume, high-complexity parts. The setup investment is significant relative to the piece count. Shops optimized for high-volume, lower-complexity work find these orders unattractive. CPI's model is built around exactly this kind of work — which is why we stay in business doing it.

What to Send Us

If you have a specialty carbide profile that needs quoting, the most useful thing you can send is your print — dimensioned drawing, material callout, tolerance stack, and any special surface finish or inspection requirements. If you don't have a fully dimensioned drawing yet, we can work from sketches or a sample part as a starting point for a conversation.

CPI will review the print, assess which processes are required, and respond with a quote that reflects the actual scope of the work. We don't quote by catalog code — because the part doesn't have one.

If your current carbide supplier is giving you no-quotes on complex geometry, it may not be that the part is impossible. It may just need to go to the right shop.

Have a Print That Needs a Home?

Submit Your Specialty Carbide Profile for a Quote

CPI works from your drawing — not from what's in a catalog. Send us the print and we'll take it from there.

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Ram/Sinker EDM Services for Carbide & Hardened Tooling

Capability & Process — June 2026

RAM EDM for Carbide Tooling: Geometry No Mill Can Reach

Some features were never meant to be cut, ground, or milled. They're burned into the material, one controlled spark at a time.

June 23, 2026  •  Georgetown, KY

A print comes back from quoting marked "feature not achievable as specified" more often than most procurement teams realize — and the reason is rarely the tolerance or the material itself. Usually it's a blind cavity, an internal form, or a re-entrant detail that no end mill, grinding wheel, or broach can physically get into. That's not a design flaw. It's a process gap, and it has a specific answer.

RAM EDM — also called sinker EDM or plunge EDM — solves exactly that problem. It's one of the capabilities that quietly decides whether a hardened die, a punch retainer, or a carbide-tipped component gets made in-house as specified, or gets bounced back to engineering for a redesign that was never actually necessary.

How RAM EDM Actually Works

RAM EDM forms a shaped electrode — copper or graphite, machined or wire-EDM'd to the inverse of the geometry you need — and advances it into the workpiece through a dielectric fluid. A controlled series of electrical discharges erodes material from the part, not the other way around; the electrode never makes physical contact. The result is a cavity that's the mirror image of the electrode, sunk directly into the material rather than cut through it.

That's the key difference from wire EDM, which threads a wire through a pre-drilled start hole and cuts a two-dimensional profile, typically all the way through the part. RAM EDM doesn't need a through-hole and doesn't need to go all the way through — which is exactly why it's the right process for blind pockets, internal forms, and blind die details that wire EDM structurally cannot produce.

The Process in Three Facts

No cutting force: the electrode never touches the part, so there's no tool deflection and no mechanical stress on thin walls or delicate features.

Hardness is irrelevant: fully heat-treated D2, A2, or carbide grades erode the same as soft stock — no "machine soft, heat treat, hope nothing moved" sequencing required.

The electrode is the geometry: because the cavity is the inverse of the electrode, it can be built from a print, a sample, or reverse-engineered from a worn part with no print at all.

Where RAM EDM Shows Up in Precision Tooling

In practice, RAM EDM earns its place on a handful of recurring job types — the ones where conventional material removal simply doesn't have a way in:

Blind Cavities & Internal Forms

Die details, retainer pockets, forming tools

Die cavities and punch retainer pockets that go into a hardened die shoe rather than through it are the classic RAM EDM job — geometry with no through-access for a cutter, but a clean path for a formed electrode.

Carbide Profile Work Grinding Can't Reach

Small-radius internal corners, undercuts

Internal corners and undercut details on carbide inserts and knife profiles often sit at an angle no grinding wheel can approach. RAM EDM reaches them because it never needs line-of-sight access for a physical tool.

Hardened Tool Steel After Heat Treat

Finishing internal features post heat-treat

Finishing an internal feature after heat treat — rather than risking distortion by machining it before — is routine with RAM EDM, since hardness doesn't change cycle time or tool wear the way it does in conventional cutting.

Geometry Matching & Reverse Engineering

Worn cavities, obsolete tooling, no print on file

When a cavity has worn out of spec and no print exists, we can build an electrode from a measured sample or a salvageable reference part and reproduce the original geometry exactly — no redesign required.

Why This Belongs In-House, Not Split Across Vendors

RAM EDM for carbide and hardened tool steel is genuinely specialized, and most contract shops refer it out. That works fine until the job has a die cavity, a carbide insert, and a precision-ground mating surface all on the same print — at which point a "refer it out" answer means three vendors, three lead times stacked on top of each other, and a traceability record with gaps at every handoff.

We run wire EDM, RAM EDM, precision grinding, and traditional machining all under one roof specifically so that doesn't happen. A die insert that needs a ground mating face, a blind pocket, and a carbide wear surface moves through one shop, with one set of inspection records, instead of getting handed between suppliers who never see the whole print.

What to Send Us

If a job has come back marked "not achievable" because of an internal cavity, a blind pocket, or a feature a mill or grinder couldn't reach — that's almost always an EDM conversation, and often specifically a RAM EDM one. Send the print, or send a sample of the worn part if no print exists. We'll tell you straight whether RAM EDM is the right answer, what we'd expect to hold for tolerance, and how it fits alongside any grinding or wire EDM work the rest of the part needs.

Get a Quote

Have a Cavity or Internal Feature That Came Back "Not Achievable"?

Send us the print or a sample of the worn part — we'll tell you whether RAM EDM is the right process and what to expect on tolerance and lead time.

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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!