Bearing Quick Reference Guide - NTN
Self-Aligning Ball Bearing Numbering System 1 2 05 K C3 Type Series Bore Diameter Internal Design Cage Ring ModificationClearance 1. TYPE 1: Standard self-aligning ball bearing 2: Wide self-aligning ball bearing 2. SERIES 2: ISO 02 series 3: ISO 03 series 3. BORE 00: 10mm 01: 12mm 02: 15mm 03: 17mm 04+: # * 5 = Bore diameter in mm (ex. 04=20 mm) 4.
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