The desk that answers the questions the catalogue cannot: which suffix, which clearance, which brand equivalent, and why the bearing failed.
| Selection | From load, speed, temperature, environment and life target — with the calculation shown |
|---|---|
| Interchange | Cross-brand equivalents, with the differences stated rather than hidden |
| Suffix decoding | Seals, clearance, cage, precision, heat treatment and special variants |
| Fits and clearance | Shaft and housing fits to ISO 286, clearance selection for thermal conditions |
| Failure analysis | Photographs, ISO 15243 mode identification and a written recommendation |
| Response time | 30 minutes for selection and interchange · 1–3 days for failure analysis |
| Cost | No charge on quotation-stage questions; failure analysis quoted per case |
A drawing says 6205-2RS C3. The catalogue has 6205-2RS1, 6205-2RSH, 6205-2RSR, 6205-LLU and 6205-DDU, all with the same boundary dimensions and all described as “sealed”. The differences are seal design, torque, speed limit and grease fill. Choosing wrong is a warranty claim waiting to happen; decoding them is what this desk does.
Usually yes on dimensions, and sometimes no on everything else. A 6205 from two brands can differ in internal clearance, cage material, grease, seal type and load rating. We state which differences matter for the application rather than declaring a blanket equivalence.
Too tight a shaft fit closes the internal clearance and the bearing runs hot; too loose and the ring creeps. The correct fit depends on load direction, rotating ring, temperature and housing material — and it is the most common cause of a bearing that “failed early for no reason”.
Failure mode tells you what to change. ISO 15243 names the modes: fatigue, wear, corrosion, electrical erosion, plastic deformation, fracture. A fluted raceway is electrical erosion and no bearing material will fix it; a rusty raceway with a dry grease is moisture ingress and the seal is the problem. We identify the mode and recommend the change, in writing.
| Question type | Input needed | Turnaround | Deliverable |
|---|---|---|---|
| Bearing selection | Load, speed, life target, environment | 30 min | Model, size, suffix, calculation |
| Interchange | Model number or dimensions | 30 min | Equivalent + differences list |
| Suffix decoding | The number as written | 30 min | Plain-language explanation |
| Fit & clearance | Shaft/housing size, load direction, temperature | Same day | ISO 286 fit table + clearance |
| Failure analysis | Failed part + photos + service history | 1–3 days | Written report, ISO 15243 mode |
| BOM matching | BOM or parts list | 1–3 days | Matched list with substitutions flagged |
The ISO 286 tables behind the recommendation.
Read →L10 and L10h from load and speed.
Read →Look up an equivalent before asking.
Read →When the failure is a counterfeit, not a design error.
Read →Yes at quotation stage — selection, interchange and suffix questions are part of the service. Failure analysis with a written report is quoted per case, because it takes laboratory time.
Yes. Send the load, speed, life target and environment, and we will propose a size, a suffix and the calculation behind it. The design authority and the safety factor remain yours.
Yes — photographs, dimensional check, and where useful a lubricant and contamination assessment. The report names the ISO 15243 failure mode and the change that would prevent recurrence.
Yes. Send the list with quantities; we return it with matched part numbers, brand options, substitutions flagged and prices. Large BOMs take one to three days.
Send photographs with a scale and the three boundary dimensions. If it is a standard part, we will identify it; if it is not, we will quote a custom replacement to the measured dimensions.
Send the drawing, the model list or the failure report. We reply with a scope, a price and a lead time within 30 minutes on working days.