Tightening torques
See the recommended torque for tightening the bolts in Tightening torques for bolts grade 8.8 (EN ISO 898-1). All bolts used are grade 8.8 according to EN ISO 898-1. Do not use other type of bolts. For motors and related components, follow the torques given in the separate motor manual. Use max 50 Nm torque for the bolts fastening the impeller to the motor shaft.
| Size | Torque (Nm) |
|---|---|
| M6 | 9.5 |
| M8 | 20.0 |
| M10 | 30.0 |
| M12 | 50.0 |
| M16 | 120.0 |
For the standard service switch (KEM 16-40A), the tightening torque for the cover screws (PZ2/1x5-7) is max 2.0 Nm. For electric connections, the max torque for the screws PZ2/1x5 is 1.8 Nm.