QJ304-XL-MPA
Holding a bearing marked SKF QJ304MA or KOYO 6304BI or STEYR QJ304MPA? Ours is QJ304-XL-MPA — the same seat size, the same type and the same sealing and clearance design.
What this bearing is
QJ304-XL-MPA is a Four-point contact bearing with a 20 × 52 × 15 mm seat, execution: open. The manufacturer's cross-reference catalogue confirms full interchangeability for 3 designations, including SKF QJ304MA, KOYO 6304BI, STEYR QJ304MPA.
Designation equivalents
⌀20 × 52 × 15 mm
Before you replace it
This is a dimensional and design equivalent: the same seat size, the same bearing type and the same sealing and clearance design. It is not the same product — load ratings, tolerance class and grease may differ between manufacturers. For duty close to the limits or a critical application, check the datasheet of the specific design.
Where these equivalents come from
The base number of a standard bearing is an ISO standard — 6205 is 6205 at every manufacturer. Only the suffixes describing the design differ, and those are what we translate: shields, contact seals, cage and radial clearance. Designations that mean different things at different makers are deliberately omitted.