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11371757 Installation, operation and maintenance manual – Squirrel cage motor – M line – Vertical l 49
8.5 TIGHTENING TORQUE
The Table 8.1 and Table 8.2 shows the tightening torques
of the screws recommended for assembling the motor.
Table 8.1: Screw tightening torque for metal/metal parts
Resistance
class
Carbon Steel /
8.8 or above
Stainless steel /
A2 – 70 or above
Strength
60%
70%
Lubricant Dry
1000
Dry
1000
Diam
(mm)
Screws tightening torque (Nm)
Table 8.2: Screw tightening torque for metal/isolated parts
Resistance
class
Carbon Steel /
8.8 or above
Stainless steel /
A2 – 70 or above
Strength
33%
33%
Lubricant Dry
1000
Dry
1000
Diam
(mm)
Screws tightening torque (Nm)
NOTE
The resistance class is normally indicated
on
the head of the hex bolts.