Anti Backlash Overview
Anti-backlash actuators reduce linear backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction or alternatively a load imposed on the lifting screw changes direction -i.e. – load changing from compression to tension. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur.
When the anti backlash screw jack is under load, the lifting screw 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.
- Duff Norton Anti-backlash Screw Jack design features a separate anti-backlash nut and
reduces actuator backlash to less than 0.001″.
- Anti-backlash nuts act as additional load safety devices when the worm gear has become worn
- Anti-backlash nuts reduce worm gear wear
- Precise Motion Control
- Available in Stainless Steel