Manual operated screw jack is ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length .

As a kind of small screw jack, there’re also a variety of power supply choice.  Various motors can be configured and used . Some small tonnages can also be equipped with handwheels or cranks for manual operation,and also can choose electric, manual assembly at the same time, so that you can continue to use without power supply, which is very convenient .

Hand operated screw jack is composed of hand wheel or hand crank and a worm gear screw jack, which has intermittent precisely positioning and self-locking feature for no creeping down without brake mechanism or other locking systems. When manual ball screw jack, no self-locking feature, avoid ball screw back drive with attached load, which needs additional brake mechanism or other locking system to prevent it creep.

For manual operated screw jacks, we recommend choose a slower speed so that it will be less laborious to shake. It should be noted that the total efficiency of the slow screw jack is not as good as that of the ordinary speed ratio screw jack. Therefore, it is necessary to determine whether the screw jack is manual or electric according to the specific situation of use.