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Guides on bearing types, designations, standards and selection.
Bearing Basics: What Bearings Do and How to Use This Site
New to bearings? Learn what a bearing does, the parts it is made of, and how to find your way around Berolix.
September 26, 2026 · basics, guideHow to Read a Bearing Designation
Decode bearing numbers like 6204-2RS or 6210/C3: type codes, dimension series, bore codes, and the most common prefixes and suffixes.
September 26, 2026 · guide, designations, standardsUnderstanding Internal Clearance: CN, C3 and When It Matters
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.
September 26, 2026 · guide, selection, clearance, standardsOpen vs Shielded vs Sealed: Which Bearing Closure to Choose
Open, ZZ metal shields or 2RS rubber seals? Compare friction, speed, protection and relubrication to pick the right closure for your application.
September 26, 2026 · guide, selection, sealing