6307 bearing: 35 × 80 × 21 mm
Bearings › 6307
A 6307 is a deep groove ball bearing, 35 mm bore, 80 mm outside diameter, 21 mm wide. Variants: 6307-2RS (rubber sealed), 6307-ZZ (metal shields), 6307 open.
| Bore | 35 mm |
|---|---|
| Outside diameter (OD) | 80 mm |
| Width | 21 mm |
| Dynamic load rating C | 35.1 kN |
| Static load rating C0 | 19 kN |
| Limiting speed | 12 000 r/min |
| Weight | 0.444 kg |
Ratings and weight: SKF product page, skf.com, read 2 Oct 2026, designation 6307. Limiting speed as SKF gives it.
Open 6307 in BenchsmithAdd to order list
What the number means
6 | Deep groove ball bearing |
3 | Medium series |
07 | Bore 07 × 5 = 35 mm |
Ask for
- 6307-2RS: rubber sealed both sides. Other brands: SKF 6307-2RSH, FAG 6307-2RSR, NSK 6307DDU, NTN 6307LLU, Koyo 6307-2RS.
- 6307-ZZ: metal shields both sides. Other brands: SKF 6307-2Z, FAG 6307-2ZR, NSK 6307ZZ, NTN 6307ZZ, Koyo 6307ZZ.
- 6307: open, no seals or shields.
Add C3 for electric motors and anything that runs hot.
About the 63 series
Same bore as the 62, but a bigger OD and wider. Heavier load, same shaft. You'll find them in pumps, compressors and the drive end of bigger motors.
If a 62 keeps failing and the housing has room, a 63 is the usual upgrade. Check the housing bore first; it won't fit a 62's seat.
Same bore, different size
One size up or down
Every bearing 35 × 80 × 21 mm: 35 × 80 × 21 mm bearings. Measured a bearing with no number on it? Type the bore, OD and width into Benchsmith → Find → Bearing.