Metric Anti-backlash Screw Jacks

Backlash occurs when the motor driving an actuator reverses its load direction. 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.

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