Why Obsolete Parts Are the Hardest — and Why We Do It
When a part goes obsolete, every failure becomes a crisis. There is no part on a shelf, no OEM to call, no cross-reference to a current equivalent. The machine sits idle and the cost accumulates by the hour. Customers come to us specifically because the normal supply chain has no answer.
We reproduce obsolete parts regularly. The process is direct: measure what survives, reconstruct what doesn't, confirm the geometry with you, manufacture, and ship.
When No Original Part Survives
The most difficult scenario is when there is nothing left to measure — the part failed completely and was discarded, or was never retained. We work through this systematically:
- Mating parts — the bore it sat in, the shaft it drove, the housing it sealed against. From these we derive the missing dimensions.
- Exploded diagrams and spare-parts manuals — older equipment often has parts books with proportional diagrams. We use these scaled to known reference dimensions.
- Similar models — the same machine in a later variant may have updated but compatible parts. We use these as a baseline and adjust.
- Failed fragments — even heavily broken parts carry geometry: cross-sectional profiles, bore positions, wall thickness, thread starts.
Should You Upgrade When Reproducing?
| Original failure mode | Upgrade option | Result |
|---|---|---|
| Worn bearing surface | Case harden or hard chrome the journal | Longer service life at same geometry |
| Cracked at a stress point | Increase fillet radius, switch to ductile iron or alloy steel | Eliminates the original failure mode |
| Corroded in service | Upgrade to 316 stainless or bronze | Resists environment that destroyed the original |
| Plastic worn or broken | Machine in bronze or acetal (Delrin) | Significantly longer wear life |
| Exact OEM replica needed | No change — reproduce exactly | Drop-in replacement, fully interchangeable |
Make spares while you're at it. Once we have the CAD for a previously obsolete part, making 2–3 spares from the same setup costs a fraction of the first piece. It means the next failure doesn't put you back to square one. We recommend it for every obsolete part job.
Process
Tell us the situation
What failed, what equipment it came from, what you still have — part, photos, mating assembly, manual pages. We assess the best reconstruction route.
We gather all evidence
Measurement of the sample or mating parts, photograph analysis, manual interpretation. All sources are used and cross-checked.
Reconstruct — noting all assumptions
CAD model built. Every dimension derived from inference (not direct measurement) is flagged in the drawing for your review. Nothing is hidden.
You confirm
Review the drawing. Correct any inferences you recognise from knowledge of the machine. Specify upgrades if desired. We revise and confirm before cutting.
Manufacture, inspect, ship
Part made, inspected to the approved drawing, shipped with inspection report and CAD file. Spares from the same run at marginal cost.
Obsolete Parts We Have Reproduced
Parts that no OEM or aftermarket supplier could provide — reproduced from worn samples, fragments, mating parts or period diagrams:
Obsolete Bearings: What We Reproduce — and What We Don't
Reverse engineering a bearing from a worn part is among the most common obsolete-part requests we receive, so here is the honest breakdown. Rolling-element bearings (ball and roller cartridges) are almost never worth remaking — a modern standard bearing is metallurgically better and cheaper. What actually goes obsolete is everything around the rolling elements, and that is exactly what we reverse engineer from the worn part:
- Plain bearings, bushings and journal bearings — bronze, sintered or polymer-lined, measured from the worn original with wear compensated back to the design fit
- Bearing housings, carriers and pillow-block bodies — discontinued castings reproduced as machined billet parts
- Adapter sleeves and conversion bushings — so a current standard bearing fits the seat of an obsolete one, often the fastest and cheapest fix
- Wear rings, thrust washers and seal carriers — recovered from fragments or the mating surfaces when the original is gone
If your bearing failure sits inside a pump, see our pump parts reverse engineering; for gearbox and spindle applications, see machine parts.
Frequently Asked Questions
Yes. We reproduce the part from your sample, from mating components, from old manual diagrams, or from whatever remains. We do not need the original manufacturer's cooperation, drawings or tooling.
We work from the components the part interfaces with — the bore it sat in, the shaft it drove, the housing it sealed. Dimensions are derived indirectly and confirmed against the assembly before we manufacture. This works for a surprising proportion of lost originals.
Often worth considering. If the original failed in a predictable way — wear on a specific surface, corrosion in a particular area, cracking at a stress concentration — we can address it in the reproduction. Switching from cast iron to ductile iron, plastic to bronze, or adding a hard-chrome surface are common upgrades at negligible extra cost.
One piece. There is no minimum order on machined parts. We recommend making 2–3 spares from the same setup so the next failure doesn't put you back to square one, but one is a perfectly valid order.
Yes — for the parts around the rolling elements. We reverse engineer a bearing housing, plain or journal bearing, adapter sleeve, wear ring or seal carrier from the worn part, measuring the original and compensating wear back to the design fit. Modern rolling-element cartridges themselves we'd fit as standard rather than remake, and we tell you which path is cheaper for your case.
Obsolete Part — Get a Quote
Describe the situation. Engineers reply in 24h.
// Qty & price
1 pc
Sample price
Confirm fit before a run
3–10
Unit price drops
Setup cost shared
10+
Best price
All tiers quoted upfront
- →No distributor — you pay the maker directly
- →CAD saved after first order — reorder anytime at lower unit price
support@ekinsun.ltd
REVERSE ENGINEERING