6303 bearing: 17 × 47 × 14 mm
Bearings › 6303
A 6303 is a deep groove ball bearing, 17 mm bore, 47 mm outside diameter, 14 mm wide. Variants: 6303-2RS (rubber sealed), 6303-ZZ (metal shields), 6303 open.
| Bore | 17 mm |
|---|---|
| Outside diameter (OD) | 47 mm |
| Width | 14 mm |
| Dynamic load rating C | 14.3 kN |
| Static load rating C0 | 6.55 kN |
| Limiting speed | 22 000 r/min |
| Weight | 0.11 kg |
Ratings and weight: SKF product page, skf.com, read 2 Oct 2026, designation 6303. Limiting speed as SKF gives it.
Open 6303 in BenchsmithAdd to order list
What the number means
6 | Deep groove ball bearing |
3 | Medium series |
03 | Bore code 03 = 17 mm |
Ask for
- 6303-2RS: rubber sealed both sides. Other brands: SKF 6303-2RSH, FAG 6303-2RSR, NSK 6303DDU, NTN 6303LLU, Koyo 6303-2RS.
- 6303-ZZ: metal shields both sides. Other brands: SKF 6303-2Z, FAG 6303-2ZR, NSK 6303ZZ, NTN 6303ZZ, Koyo 6303ZZ.
- 6303: 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 17 × 47 × 14 mm: 17 × 47 × 14 mm bearings. Measured a bearing with no number on it? Type the bore, OD and width into Benchsmith → Find → Bearing.