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| Product model | W 630/2.5-2Z |
| d | 2.5 mm |
| D | 8 mm |
| B | 4 mm |
| Limiting speed | 80000 r/min |
| d1 | ≈4.1 mm |
| d2 | ≈4.1 mm |
| D2 | ≈7.04 mm |
| Chamfer size (r1,2) | min.0.15 mm |
| da | max.4 mm |
| Da | max.7.2 mm |
| ra | max.0.15 mm |
| pu | 0.004 kN |
| Reference speed | 160 000 r/min |
| kr | 0.03 |
| f0 | 5.9 |
| Radial runout | National Standard |
| Dimensional tolerance | National Standard |