Figure 3: Motor Fastening
Large-surface Washer
In order to achieve an adequately large contact surface, apply a large-surface washer under each nut or screw head
.
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Alternatively use flange nuts or bolts.
If the motors' shaft end points up or down (vertical mounting arrangement), it is necessary to fit an appropriate cover
to prevent any foreign bodies from dropping in the driven machine through the air inlet and outlet openings in the
ventilator hood.
Please note!
The flow of cooling air through the motor must not be limited by said cover.
The balance of the motors is specified on the shaft end plate and/or on the rating plate (H = half key, F = full key, N
= no key).
The design of the coupling or pulley must match the motor's balance.
Please note!
If balancing with half key (H), work on the vertical (visible) key components on the shaft diameter
or cover these with washers with keyway along the relevant length.
If the coupling is longer than the key, it is necessary to fill the keyway in the remaining part of the
coupling.
In case of failure to comply with the foregoing, out-of-balances liable of causing excessive vibra-
tions may occur.
Please note!
Mount the pulleys or couplings only through the threaded bores in the shaft end to avoid damag-
ing the anti-friction bearings.
Fig. 4: Fastening of the pulley or coupling
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Screw the threaded bolts in the threaded bore.
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