nord 6052902/0213, Manual With Installation Instructions, Page: 31 / 128

3 Transport, storage, assembly
B 1050 en-3921 31
Precisely align the gear unit with the drive shaft of the machine in order to prevent additional forces
from being imposed on the gear unit due to distortion. The service life of shafts, bearings and
couplings depends on the precision of alignment of the shaft. Therefore, zero deviation should always
be aimed for in alignment. For the tolerances of the shaft journals and the flange connection
dimensions, refer to the order-related dimension sheet. Also note the requirements in the operating
instructions of the used coupling.
Fasten the gear unit with all screws. Use screws with a minimum quality of 8.8. Tighten the bolts with
correct torques (see chapter 7.4 "Screw tightening torques").
Earth the gear unit housing. For geared motors, ensure the earthing via the motor connection.
3.5 Installation of a hub on solid shaft (option: V, L)
For solid shaft version (Option: V, L) the drive shaft and the output shaft are each equipped with a
closed key groove according to DIN 6885 and a centring hole according to DIN 332.
The corresponding 6885-A key is included in the scope of delivery.
NOTICE
The gear unit may be damaged by axial forces.
Bearings, gearwheels, shafts and housings may be damaged by incorrect fitting.
• Use a suitable pulling device.
• Do not hit the hub with a hammer.
Figure 9: Example of a simple pulling device
During fitting, ensure that the shaft axes are precisely aligned with each other. Comply with the
permissible tolerance details provided by the manufacturer.
Information
Use the end thread of the shafts for pulling. Fitting can be facilitated by coating the hub with lubricant
or heating it up to approx. 100 °C beforehand.
Position the coupling according to the coupling installation instructions on the specific drawing for the
order. If no position details are stated on the drawing, align the coupling flush with the end of the motor
shaft.
The maximum radial forces FR1 and FR2 and axial forces FA2 which are imposed on the
driving and driven elements of the gear unit must not be exceeded
(refer to the name plate). Pay
particular attention to the correct tension of belts and chains.