13.3
Mechanical attachment
13.3.1
Flange attachment
The screw connection must be adapted to the installation situation (screw
length, strength class, screw-in depth, material, ...) The dimensioning of the
screw connection is the responsibility of the customer.
Rexroth recommends the following screws and washers for attaching the mo‐
tors to the machine in a professional and safe manner.
Fixing screws MSK motors
Boring
⌀ [mm]
Screw 8.8
DIN EN ISO 4762
DIN EN ISO 4014
Tightening
torque
M
A
[Nm] at μ
K
= 0.12
Washer
DIN EN ISO 28738
4.5
M4 × 20
3
-
6.6
M6 × 20
10.1
-
9
M8 × 20
24.6
yes
11
M10 × 30
48
yes
14
M12 × 40
84
yes
18
M16 × 35
206
yes
Tab. 13-1:
Mounting screws tightening torque
The bolted connections for flange mounting must be able to ab‐
sorb both the weight force of the motor and the forces occurring
during operation.
If screws and washers that deviate from this recommendation are
used, the strength class of the screws and the hardness class of
the washers must be equivalent in order to transmit the required
tightening torques.
MSK motors are manufactured ex works for flange mounting (B05). Details
on the mounting holes are contained in the respective dimension sheet.
13.3.2
Preparation
Prepare the motor mounting as follows:
1. Procure tools, auxiliary materials, measuring and testing equipment.
2. Check all components for visible damage. Damaged components must
not be mounted.
3. Make sure that all system dimensions and tolerances are suitable for
motor mounting (see dimension sheet for details).
4. Check all components, mounting surfaces and threads for cleanliness.
5. Ensure that installation can be carried out in a dry, dust-free environ‐
ment.
6. Make sure that the holder for the motor flange is free of burrs.
7. Remove the protective sleeve from the motor shaft and keep the sleeve
for future use.
8. Only for motors with holding brake
Check whether the motor holding brake reaches the holding torque
specified in the data sheet. If the brake does not reach the specified tor‐
que, first loop in the holding brake at
chapter 10.10.4 "Holding brake -
commissioning and maintenance instructions" on page 134
.
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
Bosch Rexroth AG
153/175
Synchronous Servomotors MSK For Potentially Explosive Areas
Installation
