This significantly reduces friction between the ball nut and the ball screw, resulting in greater efficiency. Ball screw jacks require up to two-thirds less input torque to move the load than similarly rated machine screw jacks. They require a brake motor or external locking device to hold position.
Both upright and inverted ball screw jacks are available to lift and precisely position loads up to 50 tons. Alloy steel input shafts, aluminum bronze worm gears and tapered roller or ball thrust bearings provide rugged reliability. Compared to machine screw jacks, ball screw jacks:
• Require less motor horsepower.
• Allow higher travel speed.
• Provide an extended duty cycle.
