NORD Drivesystems B1050 - Manual (Page 12)

3.Storage, Transport,
Preparation, Installation
www.nord.com B1050-GB-0213 -13-
Welding of the gear unit is prohibited. The gear unit must not be used as the earth connection for
welding work, as this may cause damage to the bearings and gear wheels.
The gear unit must be installed in the correct orientation (see Section 6.1). All gear unit feet
on each side or all flange screws must be used. Bolts must have a minimum quality of 8.8. The
bolts must be tightened to the correct torques (refer to Section 6.4 for torque values). Tension-
free bolting must be ensured, particularly for gear units with a foot and flange.
Danger!
To ensure that the gearbox does not get too hot and to avoid injury to persons, observe
the following during installation:
 The surfaces of gear units or geared motors may become hot during or shortly after
operation. Attention: danger of burns!! Protection against accidental contact may need to
be installed.
 With geared motors, the cooling air of the motor fan must be able to flow unobstructed
onto the gear unit.
3.6 Fitting hubs on the gear shafts
Attention!
Do not subject the gear unit to harmful axial forces when fitting the hubs.
Drive and driven elements, e.g. coupling and chain-wheel hubs must be mounted onto the drive
and driven shaft of the gear unit using suitable pullers that will not apply damaging axial forces
onto the gear unit. In particular, do not hit the hubs with a hammer.
Use the end thread of the shafts for pulling. Fitting can be aided by coating the hub with lubricant
or heating it up to approx. 100
o
C beforehand.
Figure 3-5: Example of a simple pulling device
Danger!
Drive and driven elements, such as belt drives, chain drives and couplings must be fitted
with contact protection.
Drive and driven elements may only subject the drive unit to the maximum radial forces
and axial forces F
A
specified in the catalogue. Observe the correct tension, particularly on
belts and chains. Additional loads due to unbalanced hubs are not permitted. The radial force
must be applied to the gear unit as closely as possible.