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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
● If the transmission element is drawn up on to the shoulder of the shaft, you must ensure
The following applies for all 2-pole machines and 4-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.
The feather key can fall out
The feather keys are only locked against falling out during shipping. If a machine with two
shaft extensions does not have an output element on one shaft extension, the feather key
can fall out during operation.
Death or serious injury can result.
● Do not operate the machine unless the transmission elements have been pulled on.
● On shaft extensions without output element, make sure that the feather key cannot fall
5.2.5
Lifting and transportation
● Persons driving cranes and fork lift trucks must hold appropriate qualifications.
● When lifting the machine, use only approved and undamaged sling guides and spreaders
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
must machine off the section of feather key protruding from the shaft contour and
transmission element in order to maintain the balance quality.
that the part of the coupling groove where the feather key is not inserted is taken into
consideration when balancing the coupling.
The number of poles of the machine is specified on the rating plate (in the designation of
the motor type).
WARNING
out and shorten it by approximately half for balance type "H".
of sufficient rated capacity. Check these before using them. The weight of the machine is
stated on the rating plate.
5.2 Lift the machine to where it will be installed, and position it
Assembling
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