6004 bearing: 20 × 42 × 12 mm
Bearings › 6004
A 6004 is a deep groove ball bearing, 20 mm bore, 42 mm outside diameter, 12 mm wide. Variants: 6004-2RS (rubber sealed), 6004-ZZ (metal shields), 6004 open.
| Bore | 20 mm |
|---|---|
| Outside diameter (OD) | 42 mm |
| Width | 12 mm |
| Dynamic load rating C | 9.95 kN |
| Static load rating C0 | 5 kN |
| Limiting speed | 24 000 r/min |
| Weight | 0.0656 kg |
Ratings and weight: SKF product page, skf.com, read 2 Oct 2026, designation 6004. Limiting speed as SKF gives it.
Open 6004 in BenchsmithAdd to order list
What the number means
6 | Deep groove ball bearing |
0 | Extra-light series |
04 | Bore 04 × 5 = 20 mm |
Ask for
- 6004-2RS: rubber sealed both sides. Other brands: SKF 6004-2RSH, FAG 6004-2RSR, NSK 6004DDU, NTN 6004LLU, Koyo 6004-2RS.
- 6004-ZZ: metal shields both sides. Other brands: SKF 6004-2Z, FAG 6004-2ZR, NSK 6004ZZ, NTN 6004ZZ, Koyo 6004ZZ.
- 6004: open, no seals or shields.
Add C3 for electric motors and anything that runs hot.
About the 60 series
Same bore as the 62, but thinner. A smaller OD and narrower. Used where there's no room: gearbox layshafts, small rollers, fans, power tools.
Lighter load than a 62. Don't swap a 60 into a 62's place with a sleeve to make it fit; it'll fail long before the 62 would.
Same bore, different size
One size up or down
Every bearing 20 × 42 × 12 mm: 20 × 42 × 12 mm bearings. Measured a bearing with no number on it? Type the bore, OD and width into Benchsmith → Find → Bearing.