Super High Speed Screw Jacks' housing is made of aluminum alloy with surface oxidation treatment. Compared with cast iron gearbox, it is lighter in weight, higher in strength, and easier to dissipate heat. Its features include one shaft, two shafts, three shafts, four shafts, grinding-grade spiral bevel gears, alloy steel input shafts and high-quality ball screw. These bevel ball jacks are especially suitable for high speed and high-frequency operation and speed up to 14m/min. Because of no self-locking function, a bevel ball jack needs a brake motor to hold the position.