Specifications For Mounting Torque Motors - Siemens Simotics T-1FW6 Operating Instructions Manual

4.3

Specifications for mounting torque motors

Mounting system
The following must be taken into account when the torque motor is mounted:
• Only use new (unused) fixing screws.
• The mounting surfaces must be free of oil and grease.
• Note the maximum permissible insertion depth of the fixing screws in the stator and rotor
(refer to the relevant installation drawing or the following table).
• Observe the minimum screw insertion depth of the fixing screws with M8 threads in the
stator and for mounting the rotor in the customer application: it is 10 mm.
• To secure the screws, choose long clamping lengths l
(if l
with calibrated torque wrench).
• Note the tightening torques specified in the table below.
• Tighten the screws in such a way that the angle of rotation is controlled. Using a
calibrated torque wrench with the shortest possible bit insert, however, ensure that they
are tightened in diagonally opposite (180°) pairs.
• Tighten all the screws to minimize the risk of them penetrating other materials.
• Do not use any liquids for securing the screws.
Explanations:
I = Clamping length of the screw in mm
k
d = Nominal diameter of the screw in mm (e.g. M8 screw: d = 8 mm)
Screw material and tightening torques
Screws of the following strength classes are required to fasten the motor to the machine
construction.
Table 4- 2
1FW6 external rotor built-in torque motors
Operating Instructions, 12/2020, A5E49196960B AB
/ d > 5 is not possible), check pretensioning of the screws at regular intervals (tighten
k
Required strength classes and tightening torques for the stator and rotor
Screw
(strength class)
M8 (8.8)
4.3 Specifications for mounting torque motors
, l / d > 5 if possible; alternatively
k k
Tightening torque
M in Nm
A
24
Installation
63