Driveshafts for Industrial Applications - GWB

Technical instructions for application
Length dimensions
The operating length of a driveshaft
is determined by:
• the distance between the driving
and the driven units
• the length compensation during
operation
The following abbreviations are
used:
L z = Compressed length
This is the shortest length of the
shaft. A further compression is
not possible.
L a = Length compensation
The driveshaft can be expanded
by this amount. An expansion
beyond that dimension is not
permissible.
L z + L a = Maximum permissible
operating
length L Bmax.
L z
L B max = L z + L a
During operation, the driveshaft
can be expanded up to this length.
The optimum working length L B
of a driveshaft is achieved if the
length compensation is extracted
by one-third of its length.
L B = L z +
1
L a [mm]
3
This general rule applies to most
of the arrangements. For applications
where larger length alterations
are expected, the operating
length should be chosen in such
a way that the movement will be
within the limit of the permissible
length compensation.
Arrangements of driveshafts
A tandem arrangement of driveshafts
could become necessary
to cope with greater installation
lengths.
Driveshaft with intermediate shaft
Driveshaft with two intermediate shafts
Basic forms of shaft combinations:
Two driveshafts with double intermediate bearing
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