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Installation
5.4 Installing the motor
Shaft extensions with feather key
The feather key data for the shaft and drive output element must match and indicate the
correct type of balancing. The drive output element must be correctly mounted.
The balance quality corresponds to vibration severity grade "A" for the complete motor;
vibration severity grade "B" is possible as an option. To ensure the required balance quality, it
must be ensured that the feather key data on the hub and motor shaft match in the case of a
shorter or longer drive output element.
• If the drive output element is shorter than the feather key with balancing type "H", then
you must machine off the section of feather key protruding from the shaft contour and
drive output element in order to maintain the balance quality.
• If the drive output element is longer than the feather key, when balancing the coupling,
take into account that the feather key does not take up all of the coupling slot.
The following applies to all four-pole motors with a frequency ≥ 60 Hz:
• The feather key must be shortened if the coupling hub is shorter than the feather key.
• The center of gravity of the coupling half should be within the length of the shaft end.
• The coupling used must be prepared for system balancing.
Align the offset at the coupling between motors and the driven machines so that the
maximum permissible vibration values according to ISO 10816-3 are not exceeded.
56
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
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