FAQ - Torque Limiter, Flexible Shaft Coupling and Line Shaft

Zero backlash, flexible Coupling

Q) How do you define zero backlash?
A) Backlash is typically defined as the play or loose motion in a drive coupling due to clearance existing between two contacting parts, which causes a permanent loss of motion between the input and output shaft hubs of the coupling. As all materials are subject to minute amounts of twist under torque, zero backlash flexible couplings also exhibit some torsional wind-up, however minimal. Bellows couplings offer the highest torsional stiffness and therefore the lowest wind-up of any flexible coupling, and with zero permanent backlash.

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