What does ZZ mean on a 6301 bearing?

Q: What does ZZ mean on a 6301 bearing?

Short answer: `ZZ` on a 6301 means metal shield on both sides (non-contact, lower drag, less sealing). The boundary dimensions stay 12 × 37 × 12 mm. Suffixes are not interchangeable: the same size with a different suffix behaves differently under load, heat or contamination.

Question

Accepted Answer

Short answer: `ZZ` on a 6301 means metal shield on both sides (non-contact, lower drag, less sealing). The boundary dimensions stay 12 × 37 × 12 mm.

Suffixes are not interchangeable: the same size with a different suffix behaves differently under load, heat or contamination.