NOTICE
Damage to the rolling-contact bearings
The rolling-contact bearings can become damaged if the gear unit skews during mounting.
The hollow shaft may be mounted on a machine shaft shoulder only if the gear unit features
one of the following:
• Torque arm
• Elastic pedestal
• Supported by gear unit swing base
Proceed as follows to mount the gear unit with integrated DU bushing:
1. Use suitable hoisting gear to lift the gear unit.
2. Mount the gear unit using the nut and screw spindle.
The gear unit is supported by the hollow shaft.
The following diagram shows the mounting process with integrated DU bushing for gear units
with a hollow shaft and spline:
① Nut ⑤ Machine shaft
② End plate ⑥ Hollow shaft
③ DU bushing ⑦ Screw spindle
④ Nut
Figure 5-11 Mounting process with integrated DU bushing for gear units with a hollow shaft and spline
Special aspects of shaft-mounted gear unit with hollow shaft and spline according to DIN 5480
Hydraulic pulling equipment can be used instead of the nut and screw spindle shown in the
diagram.
5.5.2.2 Axial locking
Depending on the version, the hollow shaft must be locked axially on the machine shaft (e.g. by
a locking ring, end plate, adjusting screw).
Assembly
5.5 Shaft-mounted gear unit with hollow shaft and spline according to DIN 5480
Assembly and operating instructions A5051en
78 Edition 06/2020
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