Specifications For Mounting The Torque Motor - Siemens Simotics T-1FW6 Configuration Manual

Configuring
5.3 Mounting
Example
The eccentricity for a 1FW6720-2PB10-2Exx torque motor (active part length 100 mm) is, for
example, 0.15 mm.
The active radial force due to this centering error is therefore:
5.3.3

Specifications for mounting the torque motor

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)
102
/ d > 5 is not possible), check pretensioning of the screws at regular intervals (tighten
k
, l / d > 5 if possible; alternatively
k k
1FW6 external rotor built-in torque motors
Configuration Manual, 12/2020, A5E50516483B AA