| Width | B | 108 | mm |
| Height | T | 86 | mm |
| Diameter | D | 40 | mm |
| length | L | 32 | mm |
| Width across Flat | W | 6 | mm |
| Mounting dimension | JB | 18 | mm |
| Upper tolerance | Tol A5 | +0,15 |
| Size thread fixing screws above | K5 | M8 | |
| Lower tolerance | Tol H2 | -0,15 | |
| Tolerance | ±0,2 |
| Fabricante | Referencia |
|---|---|
| Dr-Tretter | WB55 040 |
| minitec | WB 40 |
| Thomson | SB M40 |
| Nadella | WB40 |
| Rodriguez | WBAS 40 |
| Rodriguez | WBS 40 |
