What Is a Bearing Designation Code?
A bearing designation code is the alphanumeric part number that encodes everything about a bearing: type, series, bore size, clearance class, cage material, seal/shield type, and special modifications. Understanding designation codes allows you to cross-reference between manufacturers and specify exact replacements.
Decoding Example
6205-2RS1/C3: 6 = deep groove ball bearing, 2 = light width series, 05 = 25mm bore (05 x 5mm), 2RS1 = two contact seals, C3 = greater-than-normal clearance. See our Bearing FAQs for more examples.
Frequently Asked Questions
How do I read a bearing designation code?
Example: 6205-2RS1/C3. '6' = deep groove ball bearing type, '2' = diameter series, '05' = bore code (05 x 5 = 25mm bore), '2RS1' = two rubber contact seals, '/C3' = C3 internal clearance. Each manufacturer has slight variations, but the ISO basic designation system is universal.