20Ton SWL series screw jack , worm screw jack, screw jack, screw lift, worm gear screw jacks, worm screw lifts

Screw Jack's feature:

Economical: Compact design ,easy operation, convenient maintenance.
Low speed, low frequency:Be suitable for heavy load, low speed, low service frequency.
Self-lock: Trapezoid screw has self-lock function, it can hold up load without braking device when screw stops traveling.
Braking device equipped for self-lock will be of malfunction accidentally when large jolt & impact load