Topic: standards

Basic dynamic and static load ratings are ISO quantities, but every manufacturer prints its own symbols. A brand-by-brand guide to C/C0, Cr/C0r, Ca/C0a, Ce/Co and Timken's C90 — plus the C0 versus Co glyph trap.

Decode bearing numbers like 6204-2RS or 6210/C3: type codes, dimension series, bore codes, and the most common prefixes and suffixes.

What bearing internal clearance is, why it shrinks in operation, and how to choose between CN, C3 and C4 for temperature, speed and fit conditions.