Topic: selection
4 articles
How to Measure a Bearing: Bore, OD and Width
How to measure a bearing with calipers: bore, OD and width — then turn three numbers into the right designation.
October 8, 20266204 vs 6304: Same Bore, Different Capacity
6204 and 6304 both fit a 20 mm shaft, but the 6304 carries roughly 20% more load. Compare dimensions, load ratings and speed limits — and learn when the heavier series is worth it.
October 6, 2026Understanding 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, 2026Open 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