Bearing Cross-Reference
Cross-brand equivalents across 10 bearing types — deep groove ball, angular contact ball, four-point contact (QJ), self-aligning ball, insert/mounted ball (UC), cylindrical roller (N/NU), needle roller (RNA), spherical roller, tapered roller and thrust ball. 1009 sizes, each with brand designations, catalog links and interchange notes.
Bearing guides
Engineer-checked guides on how to read, compare and choose bearings — the knowledge behind every cross-reference here:
- How to read a bearing number — decode any designation into type, series and bore
- What "interchangeable" really means — the 5 checks before you swap a bearing
- Are SKF, FAG, NSK & NTN interchangeable? — what really differs between the brands
- How to replace a ball bearing — fit it through the correct ring, without wrecking it
- Ball vs roller: which type? — pick the right bearing family for the load and speed
- Grease vs oil — how bearings are lubricated, and which can be relubricated
- Why bearings fail — the failure modes that kill a bearing before its time
- Internal clearance: CN, C3, C4 — why the wrong clearance seizes a same-size bearing
- Seal & shield suffixes across brands — SKF 2RSH vs NSK DDU vs NTN LLU
- Identify an unmarked bearing — find the number from three measurements
- See all guides →
Find a bearing
Know the number? Type it below. Know only the size? Find a bearing by its bore diameter →
No match. Try a 4-digit designation like 6205.
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Boundary-dimension reference only. Match seal, clearance and precision suffixes before substituting any bearing.