DANA
Industrial Drive Shafts Catalogue
| Drive Shafts | |
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| Technical directions for application | ||
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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 operationThe 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 unitsBasic 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 "Kinematic's of Hookes joint") and the reaction forces acting on the connection bearings (see "Load on bearings of the connected units") are minimized. |
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