| Width across Flat | W | 4 | mm |
| Mounting dimension | JB | 15 | mm |
| Lower tolerance | Tol H2 | -0,1 | |
| Tolerance | ±0,15 |
| Sie thread fixing screws above | K5 | M6 | |
| Mounting thread below | G2 | M8 | |
| Upper tolerance | Tol A5 | +0,1 |
| heigth | H | 42.50 | mm |
| Width across flats | B | 53 | mm |
| Diameter | D | 20 | mm |
| length | L | 24 | mm |
| Tolerance | H8 |
| Manufacturer | Part Number |
|---|---|
| Nadella | CWB20 |
| Dr-Tretter | WB58 020 |
| Rodriguez | WBC 20 |
| Rexroth | 1058-020-00 |
