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How to Read Bearing Designations: A Beginner Guide

Decode the most common bearing designation codes and product numbers.

Bearing designations contain important information: bearing type (6xxx = deep groove ball, NU = cylindrical roller, 222xx = spherical roller), dimensions (05 = 25mm, 06 = 30mm), and seal type (2RS = rubber seals, 2Z = metal shields). Example: 6205-2RS means deep groove ball bearing, 25mm bore, with rubber seals on both sides.

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