Fan shroud on
MAD...
Connection diameter for air hose
[mm]
Necessary air amount on the mo‐
tor [m³/h]
160
150
1000
180 1500
225 2000
Tab. 9-5: Connection diameter fan cowl
9.7 Cooling connection MAF motors
The following coolant ports can be selected for motors with liquid cooling:
● Coolant port via the connection thread on the motor
● Coolant port via quick couplings
● To supply MAF motors with coolant, other installation materi‐
als are also required, for example, tubes and mounting
clamps These are not included in the scope of delivery.
● The inlet (IN) and outlet (OUT) can be arbitrarily assigned.
The assignment does not have any effect on the perform‐
ance data of the motor.
Coolant connection thread
Motor MAF ...
Connection via ...
Remark
Thread
Quick coupling
[Ø d
i
tube]
100 ... 130 G1/4" 9 mm Select connection
according to type
code
160 ... 225 G1/2" 13 mm
Tab. 9-6: Overview of coolant ports
The connection threads at the motor are covered with factory-provided pro‐
tective plugs. These protective plugs may only be removed immediately be‐
fore screwing in the coolant ducts or the quick coupling to prevent dirt from
entering the cooling system.
Depending on the type of selected connection threaded joint, the maximum
admissible tightening torque of the motor-side threaded joint may not be ap‐
plied to the full extent, but has to be reduced to the admissible value of the
customers' connection threaded joint. Therefore observe the information of
the manufacturer of the selected threaded connection.
The following table shows the loads allowed for the motor-sided connection
threads. If the tightening torque or screw-in depth is exceeded, the motor
may be damaged irreversibly.
Frame size MAF ... Connection thread
Max. allowed screw-
in depth [mm]
Allowed tightening
torque [Nm]
100 ... 130 G1/4" 14 18 ... 20
160 ... 225 G1/2" 18 27 ... 30
Tab. 9-7: Coolant port thread, allowed tightening torques and maximum screw-
in depths
The cooling connections on the motor side are provided for coolant connec‐
tion threads with axial sealing.
Bosch Rexroth recommends to use threaded connections which contain an
O-ring for axial sealing of the screw connections.
Bosch Rexroth AG DOK-MOTOR*-IDYN*A*EXPD-IB05-EN-P46/69
Rexroth MAD and MAF Motors in EX px d Design acc. to ATEX Directive 2014/34/EU
Connection system
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