This Duff-Norton LM1802-10 Worm Gear Actuator With Rotary Limit Switch is in new condition and guaranteed to functions 100%. It came from a local shop that was upgrading equipment and we can accept pay pal or your credit card. Please contact me with any questions 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. 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 Rotary limit switches can be used in applications where there is a need to control equipment that rotates and/or reverses. Constructed sturdy and compact with corrosion-resistant material. Rotary limit switches are available in two control voltages rating 250 or 480, and in three gear ratios Track Page Views With Auctiva's FREE Counter