Screw jack Mechanical jack

Spiral jack belongs to the mechanical principle, which uses reciprocating pulling of the handle, pulling out the claw to push the ratchet clearance to rotate. The small umbrella gear drives the large umbrella gear, causing the lifting screw to rotate and the lifting sleeve to lift or lower, thus achieving the function of lifting tension. The spiral jack is easy to operate. Spiral jacks are used in various industries such as transportation, railways, bridges, and shipbuilding.