BEARINGDEXDeep groove ball
6301 bearing
12 mm bore, 37 mm outside diameter, 12 mm width (0.4724 × 1.4567 × 0.4724 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 12 | 0.4724 |
| Outside diameter D | 37 | 1.4567 |
| Width B | 12 | 0.4724 |
Quick numbers
| Pitch diameter dm | 24.5 mm |
| Section height (D − d)/2 | 12.5 mm |
| n·dm at 1,800 rpm | 44,100 |
| n·dm at 3,600 rpm | 88,200 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball
3Diameter series 3: medium. 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 | 6301 | 6301 | 6301 | 6301 | 6301 | 6301 |
| Shields both sides | 6301-2Z | 6301-2ZR | 6301ZZ | 6301ZZ | 6301ZZ | 6301ZZE |
| Contact seals both sides | 6301-2RSH | 6301-2RSR | 6301DDU | 6301LLU | 6301-2RS | 6301-2NSE |
| Contact seals both sides, C3 | 6301-2RSH/C3 | 6301-2RSR-C3 | 6301DDUC3 | 6301LLUC3 | 6301-2RSC3 | 6301-2NSE C3 Verify |
| Non-contact seals both sides | 6301-2RSL | 6301-2BRS Verify | 6301VV | 6301LLB | 6301-2RU Verify | 6301-2NKE Verify |
| Shields both sides, C3 | 6301-2Z/C3 | 6301-2ZR-C3 | 6301ZZC3 | 6301ZZC3 | 6301ZZC3 | 6301ZZE C3 Verify |
Same size, different bearing
These share the 12 × 37 × 12 mm envelope but carry load differently. They aren't drop-in swaps.