Manual Screw Jacks

Manual Screw JacksFeature: A hand wheel is a convenient solution for manual operated a screw jack or screw jack systems. When using screw jacks in intermittent positioning applications. Hand wheels are available in a range of diameters from 5 to 12 inches and customized follow clients'need. Hand Wheels do not include a brake. Hand wheels are not recommended for use with ball screw jacks.When using hand wheel with a screw jack that can backdrive an additional locking mechanism may be required to prevent "creep". For precise position display, a range of digital counters are available for use with screw jacks. These digital counters measure the rotation of the input shaft and display corresponding position in a counter window. The display value per input shaft revolution is variable and is achieved through a series of gear reductions configured to accommodate different jack ratios, lifting screw pitch and travel distances. For standard models screw jacks, three types manual lifting speed for choose,they are ,1 full turn worm shaft,1 mm travelling stroke; 1 full turn worm shaft,0.5 mm travelling stroke; 1 full turn worm shaft,0.25 mm travelling stroke.