Which brands make a 6303 bearing, and do they interchange?

Q: Which brands make a 6303 bearing, and do they interchange?

Short answer: SKF, NSK, FAG, NTN and Timken all list a 6303 with identical ISO boundary dimensions (17 × 47 × 14 mm). They interchange by size, not by performance class. Match the suffix before you substitute: 2RS vs ZZ, C3 vs standard clearance, P0 vs P5 all change behaviour while keeping the same number.

Question

Accepted Answer

Short answer: SKF, NSK, FAG, NTN and Timken all list a 6303 with identical ISO boundary dimensions (17 × 47 × 14 mm). They interchange by size, not by performance class.

Match the suffix before you substitute: 2RS vs ZZ, C3 vs standard clearance, P0 vs P5 all change behaviour while keeping the same number.