61821-C3
Holding a bearing marked SKF 61821/C3 or NSK 61821C3 or NTN 61821C3? Ours is 61821-C3 — the same seat size, the same type and the same sealing and clearance design.
What this bearing is
61821-C3 is a deep groove ball bearing with a 105 × 130 × 13 mm seat, execution: open · clearance C3. The designation suffixes indicate SKF 61821/C3, NSK 61821C3, NTN 61821C3 as its counterparts.
Designation equivalents
⌀105 × 130 × 13 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.