9 Assembly accessory
9.1 Flange fastening
The screw connection must be adjusted to the installation situation (screw-
length, property class, screw-in depth, material, ...). The dimensioning of the
screw connection is in the responsibility of the customer.
To attach the motors properly and safely to the machine, Bosch Rexroth rec‐
ommends the following screws and washers for attachment.
Mounting screws: MSM Motors
Hole
⌀ [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
3.4 M3 × 16 1.3 -
4.5 M4 × 20 3.1 -
6 M5 × 20 6.1 -
Tab. 9-1: Tightening torque of mounting screws
The screwed connections must be able to take up both the force
due to the weight of the motor and the forces acting during opera‐
tion.
If the screws and washers used do not comply with this recom‐
mendation, the property class of the screws and the hardness
class must be equivalent in order to transmit the required tighten‐
ing torques.
MSM motors are produced for flange mounting (B05). Details on the mount‐
ing holes are given in the corresponding dimension sheet.
DOK-MOTOR*-MSM********-DA05-EN-P Bosch Rexroth AG 45/61
Synchronous Servomotors MSM
Assembly accessory
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