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| Product model | W 639/1.5 R-2Z |
| d | 1.5 mm |
| D | 5 mm |
| B | 2.6 mm |
| Limiting speed | 100000 r/min |
| d1 | ≈2.53 mm |
| D2 | ≈4.5 mm |
| D3 | 6.5 mm |
| C | 0.8 mm |
| Chamfer size (r1,2)(r1,r2) | min.0.15 mm |
| da1 | min.2.4 mm |
| ra | max.0.15 mm |
| pu | 0.002 kN |
| Reference speed | 200 000 r/min |
| kr | 0.025 |
| f0 | 5.9 |
| Radial runout | National Standard |
| Dimensional tolerance | National Standard |
| da2 | max.2.4 mm |