6306 bearing: 30 × 72 × 19 mm
Bearings › 6306
A 6306 is a deep groove ball bearing, 30 mm bore, 72 mm outside diameter, 19 mm wide. Variants: 6306-2RS (rubber sealed), 6306-ZZ (metal shields), 6306 open.
| Bore | 30 mm |
|---|---|
| Outside diameter (OD) | 72 mm |
| Width | 19 mm |
| Dynamic load rating C | 29.6 kN |
| Static load rating C0 | 16 kN |
| Limiting speed | 13 000 r/min |
| Weight | 0.34 kg |
Ratings and weight: SKF product page, skf.com, read 2 Oct 2026, designation 6306. Limiting speed as SKF gives it.
Open 6306 in BenchsmithAdd to order list
What the number means
6 | Deep groove ball bearing |
3 | Medium series |
06 | Bore 06 × 5 = 30 mm |
Ask for
- 6306-2RS: rubber sealed both sides. Other brands: SKF 6306-2RSH, FAG 6306-2RSR, NSK 6306DDU, NTN 6306LLU, Koyo 6306-2RS.
- 6306-ZZ: metal shields both sides. Other brands: SKF 6306-2Z, FAG 6306-2ZR, NSK 6306ZZ, NTN 6306ZZ, Koyo 6306ZZ.
- 6306: 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 30 × 72 × 19 mm: 30 × 72 × 19 mm bearings. Measured a bearing with no number on it? Type the bore, OD and width into Benchsmith → Find → Bearing.