Anti Backlash Devices
Joyce anti-backlash devices for screw jacks compensate for thread wear to reduce screw endplay.
|
Split Gear Design
|
A90 Design Ideal for medium dynamic loads (1/2 to 3/4 jack capacity) and full jack capacity in a static condition. This design incorporates a hardened steel plate pinned to the top of the internal gear and a secondary nut placed above the steel plate. Pressure to separate the gear and secondary nut is applied via dog point set screws placed around the secondary nut. The set screws are externally adjustable. This design will typically reduce screw endplay to .008-.012 inches. Typical applications include antenna and solar dish actuators. The A90 Design is available in upright Translating machine screw jack models from 25 to 100 tons. This unit can be ordered by using an "A90" designation at the end of the jack model number.
|
A95 Design Patent pending A95 design is capable of handling full jack capacity in dynamic as well as static conditions. This adaptation of the split gear design allows the gear teeth to remain intact and therefore retain their full load carrying capability. Adjustments are made by tightening the sleeve (housing) cap. The A95 design will typically reduce screw endplay to .008-.012 inches. This design can be used for any application requiring minimized screw endplay under full dynamic capacity. It is available in upright and inverted Translating machine screw jack models from 2 to 150 tons. This unit can be ordered by using an "A95" designation at the end of the jack model number. |
