BEARINGDEXDeep groove ball, thin section
6801 bearing
12 mm bore, 21 mm outside diameter, 5 mm width (0.4724 × 0.8268 × 0.1969 in). SKF numbers it 61801.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 12 | 0.4724 |
| Outside diameter D | 21 | 0.8268 |
| Width B | 5 | 0.1969 |
Quick numbers
| Pitch diameter dm | 16.5 mm |
| Section height (D − d)/2 | 4.5 mm |
| n·dm at 1,800 rpm | 29,700 |
| n·dm at 3,600 rpm | 59,400 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball, thin section
8Diameter series 8: thin section. Width series 0 is implied and left off.
01Bore code 01 is a fixed code for 12 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61801 | 6801 | 6801 | 6801 | 6801 | 6801 |
| Shields both sides | 61801-2Z | 6801-2ZR | 6801ZZ | 6801ZZ | 6801ZZ | 6801ZZE |
| Contact seals both sides | 61801-2RSH | 6801-2RSR | 6801DDU | 6801LLU | 6801-2RS | 6801-2NSE |
| Contact seals both sides, C3 | 61801-2RSH/C3 | 6801-2RSR-C3 | 6801DDUC3 | 6801LLUC3 | 6801-2RSC3 | 6801-2NSE C3 Verify |
| Non-contact seals both sides | 61801-2RSL | 6801-2BRS Verify | 6801VV | 6801LLB | 6801-2RU Verify | 6801-2NKE Verify |
| Shields both sides, C3 | 61801-2Z/C3 | 6801-2ZR-C3 | 6801ZZC3 | 6801ZZC3 | 6801ZZC3 | 6801ZZE C3 Verify |