Hoisting and lifting are the main functions of the grooved drum, which uses the spiral and vertical or lebus system groove to help the rope wrap smoothly and achieve the purpose of lifting heavy objects. It mainly includes offshore platform crane winch, port and wharf crane winch, Tower crane winch, crawler crane winch and gantry crane winch.
The grooved barrel can be divided into flange and non flange, as well as shaft and non shaft.