What does ZZ mean on a 6302 bearing?

Q: What does ZZ mean on a 6302 bearing?

Short answer: `ZZ` on a 6302 means metal shield on both sides (non-contact, lower drag, less sealing). The boundary dimensions stay 15 × 42 × 13 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 6302 means metal shield on both sides (non-contact, lower drag, less sealing). The boundary dimensions stay 15 × 42 × 13 mm.

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