Motor assembly
6.1 Motor assembly
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 depth of engagement of the fixing screws in the stator and rotor (refer to the relevant installation drawing).
●Minimum depth of engagement of the fixing screws in the stator:
1.3x d (for 1FW609 to 1FW613);
1.0x d (for 1FW615 and larger)
●Minimum depth of engagement of the fixing screws in the rotor flange: 1.0 x d (in steel)
●To secure the screws, choose long clamping lengths lk, lk / d > 5 if possible; alternatively (if lk / d > 5 is not possible), check pretensioning of the screws at regular intervals (tighten 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:
Ik = Clamping length of the screw in mm
d = Nominal diameter of the screw in mm (e.g. M8 screw: d = 8 mm)
Screw material and tightening torques
Screws of varying strength classes are required to secure the motor to the machine structure. The table below shows the required strength classes and tightening torques for the stator and rotor fixing screws.
Table 6- 3 Required strength classes and tightening torques for the stator and rotor
Type series | Screw | Tightening torque |
| (strength class) | MA in Nm |
M5 (8.8) | 4.5 | |
|
| |
M5 (8.8) | 5.2 | |
|
| |
M6 (8.8) | 9 | |
|
|
1FW6 | 83 |
Configuration Manual, 05/2009, |
