Manual Screw Jack is made up of hand wheel or hand crank and a worm gear screw jack.
It is suitable for applications where
electricity or power generators is inconvenient or dangerous, light
weight, low duty cycle, low target cost and short travel length.
Screw jack lift system structures include miter gearboxes, screw jacks, electric motor or gear reducer, hand wheel, pillow block bearings, jaw couplings and line shafts.