BEARINGDEXDeep groove ball, miniature
624 bearing
4 mm bore, 13 mm outside diameter, 5 mm width (0.1575 × 0.5118 × 0.1969 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 4 | 0.1575 |
| Outside diameter D | 13 | 0.5118 |
| Width B | 5 | 0.1969 |
Quick numbers
| Pitch diameter dm | 8.5 mm |
| Section height (D − d)/2 | 4.5 mm |
| n·dm at 1,800 rpm | 15,300 |
| n·dm at 3,600 rpm | 30,600 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball
2Diameter series 2: light
4Single digit: bore is 4 mm, written directly
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 624 | 624 | 624 | 624 | 624 | 624 |
| Shields both sides | 624-2Z | 624-2ZR | 624ZZ | 624ZZ | 624ZZ | 624ZZE |
| Contact seals both sides | 624-2RSH | 624-2RSR | 624DDU | 624LLU | 624-2RS | 624-2NSE |
| Contact seals both sides, C3 | 624-2RSH/C3 | 624-2RSR-C3 | 624DDUC3 | 624LLUC3 | 624-2RSC3 | 624-2NSE C3 Verify |
| Non-contact seals both sides | 624-2RSL | 624-2BRS Verify | 624VV | 624LLB | 624-2RU Verify | 624-2NKE Verify |
| Shields both sides, C3 | 624-2Z/C3 | 624-2ZR-C3 | 624ZZC3 | 624ZZC3 | 624ZZC3 | 624ZZE C3 Verify |