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Geislinger Coupling

The coupling size should be selected so that the coupling's nominal torque
T KN is greater or equal to the mean torque
T specified by the prime mover / application.
KN

TT

It is not recommended nor necessary to choose a coupling that is oversized.

Stiffness Series

Four different stiffness series are listed in this catalog. For special applications, where the torsional vibration calculation proves it to be necessary, custom stiffnesses can be produced with no additional lead-time or cost. To transmit the same nominal torque, a larger overall size is required for a softer coupling (series 120) than for a stiffer coupling (series 45). Fig. 4 illustrates the dependence of the nominal torque
T KN on the choice of stiffness for the same coupling size. Initially, it is recommended that a stiff coupling be selected (series 45). Confirmation that a selected stiffness is suitable for a given application can only be obtained by performing a torsional vibration calculation. The calculation must use the excitations of the total system and must be performed for all possible operating conditions (normal operation, misfiring of one cylinder, etc.) and speeds. For these calculations, it is necessary to use the given dynamic stiffness and damping factor (Pages 11 - 14). Dynamic Stiffness and Damping factors both depend on the frequency of the vibration considered. From the analyses results, for instance the vibratory torques can be determined. These consist of damping and elastic components and must be checked against the permitted values as described in the following chapters.
Fig. 4 90/15/45H 90/15/75H 90/15/120H T
KN = 210 kNm T
KN = 164 kNm T
KN = 124 kNm
Geislinger GmbH, 5300 Hallwang, Austria Coupling Catalog: Version 17.1 9 / 118