fore screwing in the coolant lines or the quick coupling in order to prevent dirt
from entering the cooling system.
Notes for assembly for coolant
ducts
Frame size Connection
Screw-in depth
[mm]
Tightening tor‐
que [Nm]
MSK071 Pipe thread ISO 228 G 1/8 8 14 ... 15
MSK075 Pipe thread ISO 228 G 1/8 8 14 ... 15
MSK101 Pipe thread ISO 228 G 1/8 9 14 ... 15
MSK133 Pipe thread ISO 228 G 1/4 14 18 ... 20
Tab. 6-6: Cooling connection, permissible screw-in depths and tightening tor‐
ques
The coolant port threads on the motor may
be destroyed by incorrect tightening torques!
The allowed motor connection tightening torque may not be exceeded! If the
tightening torque or screw-in depth is exceeded, the motor may be damaged
irreversibly.
The cooling connections on the motor side are provided for coolant connec‐
tion threads with axial sealing.
Bosch Rexroth recommends the use of connection fittings which contain an
O-ring for axial sealing of the screw connection.
For example, seals consisting of hemp, teflon tape or cone-shaped screw
connections are not considered to be suitable, since this type of seal may
stress the connection thread at the motor to an unreasonably high extent
and/or damage it permanently.
The tightness of the coolant connection is the responsibility of the
machine manufacturer and must be checked and approved by
him after the motor has been installed.
Additional, regular inspections to ensure proper condition of the
coolant connection should be logged in the maintenance sched‐
ule of the machine.
The maximum inlet pressure of the motors is 6 bar (3 bar for motors manu‐
factured up to 2010-01-01 FD 10W01).
Make sure that the cooling water complies with the requirements see proj‐
ect planning description DOK-MOTOR*-MSK********-PR------P, "Synchro‐
nous Servomotors MSK".
36/57
Assembly
MSK Synchronous Servomotors
Bosch Rexroth AG R911325169_Edition 03
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