61921
Holding a bearing marked SKF 61921 or NSK 61921 or NTN 61921? Ours is 61921 — the same seat size, the same type and the same sealing and clearance design.
What this bearing is
61921 is a deep groove ball bearing with a 105 × 145 × 20 mm seat, execution: open · clearance CN. The designation suffixes indicate SKF 61921, NSK 61921, NTN 61921 as its counterparts.
Designation equivalents
⌀105 × 145 × 20 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.