BEARINGDEXDeep groove ball
6312 bearing
60 mm bore, 130 mm outside diameter, 31 mm width (2.3622 × 5.1181 × 1.2205 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 60 | 2.3622 |
| Outside diameter D | 130 | 5.1181 |
| Width B | 31 | 1.2205 |
Quick numbers
| Pitch diameter dm | 95.0 mm |
| Section height (D − d)/2 | 35.0 mm |
| n·dm at 1,800 rpm | 171,000 |
| n·dm at 3,600 rpm | 342,000 |
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.
12Bore code 12 × 5 = 60 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 6312 | 6312 | 6312 | 6312 | 6312 | 6312 |
| Shields both sides | 6312-2Z | 6312-2ZR | 6312ZZ | 6312ZZ | 6312ZZ | 6312ZZE |
| Contact seals both sides | 6312-2RSH | 6312-2RSR | 6312DDU | 6312LLU | 6312-2RS | 6312-2NSE |
| Contact seals both sides, C3 | 6312-2RSH/C3 | 6312-2RSR-C3 | 6312DDUC3 | 6312LLUC3 | 6312-2RSC3 | 6312-2NSE C3 Verify |
| Non-contact seals both sides | 6312-2RSL | 6312-2BRS Verify | 6312VV | 6312LLB | 6312-2RU Verify | 6312-2NKE Verify |
| Shields both sides, C3 | 6312-2Z/C3 | 6312-2ZR-C3 | 6312ZZC3 | 6312ZZC3 | 6312ZZC3 | 6312ZZE C3 Verify |
Same size, different bearing
These share the 60 × 130 × 31 mm envelope but carry load differently. They aren't drop-in swaps.