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MS2N
Sealing air connection
Bosch Rexroth AG
R911347581, Edition 05
The connecting threads on the motor are covered
with factory-attached protective caps. These pro-
tective caps may only be removed immediately
before screwing in the coolant ducts to prevent
dirt from entering into the cooling system.
Table 12: Coolant connection thread, allowed
tightening torques and screw-in depths
Motor
Connection
Screw-in
depth
[mm]
Tightening
torque
[Nm]
MS2N07 Pipe thread ISO228-G
1/8
10
14 ... 15
MS2N10 Pipe thread ISO228-G
1/8
10
14 ... 15
MS2N13 Pipe thread ISO228-G
1/4
14
18 ... 20
NOTICE
The coolant port threads on the motors may be
damaged 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 coolant connections are designed for screw
connections with axial sealing.
Bosch Rexroth therefore recommends to use
screw connections which contain an O-ring for
sealing the screw connection in axial direction.
Seals consisting of hemp, teflon tape or cone-
shaped screw connections are not considered
to be suitable, as these seals may stress the
connection thread at the motor and damage it
permanently.
Remark:
The machine manufacturer is respon-
sible for ensuring that the coolant connection is
tight and for verifying and accepting the tightness
after the motor has been installed.
Additionally, record regular monitoring of the
proper state of the coolant connection in the
maintenance plan of the machine.
7.6
Sealing air connection
The sealing air connection is rotatable. The com-
pressed air hose 4
×
0.75 is not included in the
scope of delivery.
Fig. 32: Connection compressed air hose for
using sealing air.
NOTICE
Damage due to permanent existing liquid on the
shaft sealing ring!
The use of sealing air does not prevent the pene-
tration of continuously existing liquid on the shaft
sealing ring (e.g. for open gearboxes). Due to
capillary action, gearbox oil can penetrate into
the motor and damage it, despite using sealing
air.
NOTICE
Damage due to ingress of dirt!
The compressed air gland is not closed upon
delivery. Always operate motors with com-
pressed air connection with connected com-
pressed air supply.