Screw jack with handwheel JTW-5T

trapezoidal screwworm gearcast iron

manual operated worm screw jack 5ton. Worm gear jack main components of screw jacks are trapezoidal lifting screw, worm screw, worm gear and gear housing. Hand wheels are available for Worm Screw Jack so that it can be easily used for manual operation. Hand wheels are used for self-lock equipped Machine Screw Type Power Jacks only. Worm gear is rotated by worm screw. The lifting screw moves through the rotating worm gear. The linear motion speed of lifting screw depends on thread size and rotation ratio of worm gears. Manual Screw Jack is very popular for all kinds of applications. So when to use it? 1. In case of power failure, screw jacks can be moved manually via a handwheel. To do this, one input shaft shall be available on the screw jack for the connection of the handwheel. If a brake motor is used, the brake shall be un-clamped firstly, so to allow for movement. 2. Light load, low duty cycle, low-speed application. 3. Intermittent positioning applications.