Assembly
5.4 Installing the machine
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
65
Pushing on the power output elements
● Requirements:
– The coupling and/or the output element must be appropriately dimensioned for the
operating case at hand.
– Comply with the coupling manufacturer's instructions.
– Make sure that the balancing type of the transmission element correctly matches the
type of balance of the rotor.
– Use only ready drilled and balanced transmission elements. Check the hole diameters
and the balancing status before pulling them on. Thoroughly clean the shaft extension.
● Pulling on:
– Warm up the drive output elements to expand them before pulling them on. Select the
temperature difference for the heating process to suit the coupling diameter, fit and
material. See the coupling manufacturer's instructions.
– Power output elements may only be pushed on or pulled off with the correct
equipment. The transmission element must be pulled on in one continuous operation
via the front thread holes in the shaft or pushed on by hand.
– Do not use a hammer, as this will damage the bearings.
Shaft extensions with feather key
To maintain the balancing quality, you have the following options:
● If the transmission 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
transmission element in order to maintain the balance quality.
● If the transmission element is drawn up on to the shoulder of the shaft, you must ensure
that the part of the coupling groove where the feather key is not inserted is taken into
consideration when balancing the coupling.
The following applies to all four-pole machines 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.
Danger as a result of a feather key being flung out
Rotating parts are dangerous. The feather keys are only locked against falling out during
shipping. If a machine with 2 shaft extensions does not have an output element on one shaft
extension, the feather key can be flung out during operation. Rotating parts can result in
death, serious injury or material damage.
● Do not operate the machine unless the transmission elements have been pulled on.
● On shaft extensions without drive output element, take suitable measures to ensure that
the feather key cannot be flung out. For balancing type "H", shorten the feather key by
about half.
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