SC type rack and pinion construction hoist is a special vertical transportation equipment designed for use on construction sites. It is used to transport materials and personnel vertically between different floors of construction buildings. SC200/200 is generally an upper-mounted two-drive motor (2×11/19kw), with a reduction ratio of 21.86, a lifting speed of 0-40m/min, and a rated load of 2000kg. The low-speed variable frequency construction hoist is equipped with a 37KW variable frequency drive, which can realize the speed control of the elevator, smooth acceleration and deceleration, reduce equipment wear and ensure a more comfortable riding experience.