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Anti-Backlash Actuators - 1/4 to 150 ton

Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.

Download product overview

Specifications on Standard Material Anti-backlash Actuators from 1/4 to 20 ton

Specifications on Standard Material Anti-backlash Actuators from 25 to 250 ton

Specifications on Stainless Steel Anti-backlash Actuators

Anti-backlash Key Adapter Dimensions

How Anti-backlash Works and Why Anti-backlash Control is Important

Features and Benefits

  • The Duff Norton Anti-backlash design features a separate anti-backlash nut and reduces actuator backlash to less than 1 thousandths
  • Available in Stainless Steel
  • Anti-backlash nuts reduce worm gear wear
  • Anti-backlash nuts act as additional load safety devices when the worm gear has become worn

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