Manual 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.
Manual 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.
Main features:
1. Suitable for heavy load, low speed and low frequency;
2. Main components: precision trapezoid screw pair and high precision worm gear pair;
3. It has self-locking function and can hold up load without braking device.
4. Top End: top plate, clevis end, threaded end, plain end
5. Widely applied in industries such as machinery, metallurgy, construction and hydraulic equipment.
6. Enjoy many functions such as lifting, pushing and turning.
7. Enjoy features of compact structure, small volume, light weight, wide drive sources, low noise, high reliability and long service life.
8. Easy to be mounted, flexible in use.
9. Accurately control the height of lifting or pushing.
Please watch a short video about trapezoidal screw jack with handwheel .