Cubic Bevel Gear Ball Screw Jacks, also called super high speed screw jacks, or the fastest speed screw jacks, or quick lifting screw jacks. These jacks incorporate the use of a quality Taiwan TBI Ball Screw, do not use worm gearing but bevel gearing. They are a supplement to our range of worm gear ball screw jacks. All bevel gear ball actuators are equipped with hardened, sharpened and spiral-toothed bevel gearbox ensures higher efficiency, higher lifting speed, greater duty cycle and a longer service life. The "JTQB" Series Jacks are modular design in 5 sizes. Each size is available with gear ratios 1:1 and 2:1. Gear housings are cubic design housing, compact and robust, they are made of aluminum alloy with anodizing. Compared with cast iron gearbox, it is lighter in weight, higher in strength, and easier to dissipate heat. For heavy duty model JTQB15, the gear housing is manufactured from ductile iron.