Drive Shafts
 

DANA Commercial Drive Shafts Catalogue

Installation and Maintenance
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Length dimesions

The operating length of a universal shaft is determined by:
the distance between the driving and the driven units
the length compensation during operation


The following abbreviations are used:

Lz = Compressed length

This is the shortest length of the shaft. A further compression is not possible.

La = Length compensation

The universal shaft can be expanded by this factor La is a constant factor for each universal shaft. An expansion beyond that factor is not permissible.

Lz + La = Max. perm. operating length LBmax.




During operation the universal shaft can be expanded up to this length. The optimum working length LB of a universal shaft is achieved if the length compensation is extracted by one-third of its length.
This rough rule appiles to most of the arrangements. For applications where larger length alterations are expected the operating Iength should be chosen in such a way that the movement will be within the limit of the permissible length compensation.



Arrangements of cardan shafts

A tandem arrangement of universal shafts could become necessary
to cope with greater installation lengths
to by-pass construction units


Basic forms of shaft combinations:

Universal shaft with intermediate shaft

Universal shaft with two intermediate shafts

2 universal shafts with double intermediate bearing

In case of such arrangements the individual yoke positions and deflection angles are to be adjusted with regard to one another in such a way that the degree of non-uniformity (see "Installation conditions") and the reaction forces acting on the connection bearings (see "Load on connection bearings") are minimized.
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