Sometimes a failed bearing has no readable number left. The good news: bearings are standardized, so three measurements plus the type are enough to identify almost any of them. You'll need a caliper.
Take three measurements (in mm)
- Bore (d): the inner diameter — the shaft hole.
- Outside diameter (D): the outer ring edge to edge.
- Width (B): the thickness across the bearing.
For example, 25 × 52 × 15 mm is a 6205; 30 × 62 × 16 mm is a 6206. Measure carefully — a millimetre or two changes the answer.
Note the type and build
- Type: deep-groove ball, angular contact, tapered roller, spherical roller, cylindrical roller, needle.
- Seals/shields: rubber seals (2RS), metal shields (ZZ), or open.
- Any visible markings — even a partial number narrows it fast.
Convert dimensions back to a designation
Once you have bore, OD, width and type, a bearing dimension table (or our team) maps them to a designation and the right suffix. Tapered and roller bearings use their own number series, but the same measure-and-match logic applies.
Send us the measurements
Give us the three dimensions, the bearing type and any seal markings — a photo helps — and we'll identify the bearing and quote it across the major brands, new or to a matched equivalent.