FAQ - Torque Limiters, flexible Shaft Couplings and Line Shafts

Advantages of a Bellows type miniature Coupling in an Encoder

Q) What are the advantages of a bellows type miniature coupling in an encoder?
A) Flexible encoder couplings need to exhibit an especially low restoring force under shaft misalignment, as any type of radial loading should be minimized in most cases. In the case of high resolution rotary encoders, the torsional stiffness of the encoder coupling needs to be high, as even the drag torque of the encoder bearings can cause less rigid couplings to twist slightly. Bellows type miniature couplings typically have a higher number of corrugations in the bellows, increasing the ability of the coupling to flex easily with very little compromise to torsional stiffness.

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