Fitment fear is rational. A casting that “looks right” can still miss a backing step, a bolt pattern, or a locking notch by enough to stall an outage. Trust is a checklist, not a slogan: agree critical dimensions and datums, deliver a first-article pack, then lock the next lot with install feedback.
This page is the buyer-facing proof pack for model-match / brand-compatible crusher wear parts. The capability narrative and scan story stay on mining spare parts with reverse engineering. Method detail for CT / datums stays on casting dimensional tolerances; material acceptance stays on hardness testing. Identity for quotes stays part number / model match. We do not claim “100% OEM identical” — we claim measurable checkpoints and agreed tolerances.
Answer first: how do you prove fitment?
Q: How do you prove fitment on model-match crusher wear parts?
A: Agree critical dimensions and datums up front, then deliver a first-article pack: measured dims vs revision, hardness map, material/heat reference, marking photos, and any signed deviations. For new or problematic PNs, add scan-to-CAD before the pattern is cut. After install, feed back photos and hours so the next lot stays locked. Order by part number / model match.
Language we use (and avoid)
| Use | Avoid |
|---|---|
| Part number / model match | “Genuine for [brand]” |
| Brand-compatible / aftermarket casting | Logo-led crosswalk tables |
| Agreed Rev X + FAI pack | “Guaranteed identical” |
| Desensitized QC examples | Real customer drawings or site names |
Model-match means the casting is engineered to seat and wear as the identified part for that machine configuration — proven by dimensions, not by marketing language. Start every flow with the PN / model-match RFQ template.
Table A — When RE / fitment proof is required
| Situation | Proof level |
|---|---|
| Known PN + proven pattern | Standard dims + hardness cert |
| New PN / obsolete machine / unknown revision | Full scan → CAD → FAI pack |
| Alloy or profile change on same PN family | Delta FAI on changed features |
| Prior fit complaint | 100% critical dims + install photos loop |
Rule of thumb: if nobody can show the last lot’s marking photo and dim list, treat the next shipment as a first article.
Table B — Dimensional checkpoints by family (desensitized)
| Family | Critical checkpoints | Notes |
|---|---|---|
| Cone mantle / concave | Backing face, step/diameter, height, seating | Pair as a chamber set — see chamber profile guide |
| Jaw dies | Bolt pattern, overall, tooth profile template | LH/RH if applicable |
| Cheek plates | Contour, hole pattern, thickness, hand | See cheek plate wear RFQ |
| Blow bars / impact plates | Notch, length, thickness map | See blow bar FAI checklist |
| VSI tips / anvils / plates | Mount faces, tip profile, balance-related dims | See VSI replacement checklist |
These are families of checkpoints, not universal millimetre tables. Agree the dim list Rev X before metal is poured for a new or troubled PN. Cone liners should be quoted as a mantle + concave pair when chamber family matters (cone mantle / bowl RFQ).
Table C — Scan → ship workflow (buyer view)
| Step | What buyer sees | Artifact |
|---|---|---|
| 1 Intake | PN / photos / sample or drawing | RFQ intake form |
| 2 Capture | Scan or drawing digitize | Point cloud / CAD note |
| 3 Engineering | Datums + critical dims agreed | Dim list Rev X |
| 4 Pattern / tooling | Pattern ownership stated | Pattern ID |
| 5 FAI cast | Measured vs Rev X | FAI report |
| 6 Release | Pack + markings | Cert set |
| 7 Install feedback | Site photos / hours | Feedback log (desensitized) |
Scan technology detail belongs on the reverse-engineering overview. What matters for purchasing is: which step you are in, what artifact you hold, and whether Rev X was signed before pattern cut.
Worn samples are useful for capture. They are not a silent substitute for Rev X — wash and plastic flow change geometry. Capture what you can, then engineer the agreed dim list for the as-new seat and crush faces.
Table D — First-article pack list (minimum)
| Item | Included? |
|---|---|
| Dimensional report vs agreed drawing/rev | ☐ |
| Hardness map (method + points) | ☐ |
| Material / heat reference | ☐ |
| Visual / NDT as purchased | ☐ |
| Marking photos (PN / heat / alloy) | ☐ |
| Install notes / mating cautions | ☐ |
| Deviation list (if any) signed | ☐ |
Demand this pack before the first lot ships on new or previously troubled PNs. For routine proven patterns, a shorter standard cert (dims + hardness + heat) may be enough — but write that scope in the PO so receiving is not guessing.
Impact-family receiving gates that go beyond this generic pack are on the blow bar / impact plate FAI checklist.
Table E — Fitment risk register (pre-empt complaints)
| Risk | Prevention checkpoint |
|---|---|
| Wrong revision PN | Photo of old marking + machine model match |
| Backing stack-up ignore | State compound / shim assumptions |
| Mixed chamber pair | Quote mantle + concave together |
| Thread / lock interface | Gauge critical threads on FAI |
| “Looks identical” visual only | Ban visual-only approval for first lot |
Most “it didn’t fit” tickets start as identity or assumption failures, not as mysterious foundry errors. Marking photos and written Rev X close that loop early. Fastening and seating assumptions for cones also sit beside the torch-ring / fastening checklist.
Table F — RFQ fields to start the proof flow
| Field | Send |
|---|---|
| Identity | Part number / model match |
| Evidence | Photos of markings + worn part |
| Priority features | Which dims failed last time (if any) |
| Duty notes | Rock, stage, alloy preference |
| Proof level | Standard cert vs full FAI pack |
Use the live PN / model-match RFQ fields as the master identity block, then add proof level and priority features from Table F when the PN is new, obsolete, or previously complained.
Alloy and profile after fitment
Fitment proof does not pick the alloy. Once the seat and crush geometry are locked, duty and failure mode drive manganese vs high-chrome decisions — see the high-chrome vs manganese decision tree and HSI blow bar matrix where relevant. Profile optimization (for example a finer chamber on the same machine family) is a written revision, not a silent “improvement” on a pure copy PN.
FAQ
Is a 3D scan always required?
No. Known PN with a proven pattern usually needs standard dims + hardness. Scan-to-CAD is for new, obsolete, unknown-revision, or prior-fit-complaint cases (Table A).
Is a worn sample enough to release the first lot?
It is enough to start capture. Release still needs an agreed Rev X and FAI against that revision. Worn geometry alone is not a silent release gate.
Who owns the pattern after reverse engineering?
State pattern ownership and reuse rights in the commercial pack. Orphan tooling is a supply risk — clarify before the first production lot.
Can you optimize the profile instead of a pure copy?
Yes, when duty and chamber family justify it — but treat it as a new revision with delta FAI on changed features, not as an unmarked substitute for the copied PN.
Does FAI add lead time?
Usually yes for the first article: engineering agreement + measured cast before full release. Plan MOQ and week ranges with casting MOQ / lead time expectations, not with vague “rush” promises.
What if install fails after FAI passed?
Capture site photos, measured stack-up (backing, shims, mating parts), and hours. Compare against Rev X assumptions. Update the risk register (Table E) and dim list before the next pour — do not silently change alloy or profile.
Will you publish OEM brand crosswalk tables?
No. Identity stays part number / model match / machine series evidence. That keeps the page usable and compliant.
Close
Demand the pack, not the promise. Start with PN / model-match RFQ, agree Rev X, take the Table D first-article pack on new or troubled parts, then lock the next lot with install feedback. For foundry-side proof on a specific PN, contact us with marking photos and the proof level you need.
