The wire rope electric hoist is used to wrap the wire rope on the drum, and there are strict quality standards and scrap standards for the drum part:

　　1、 Drum quality standard:

　　1. The coaxiality of the center lines at both ends of a drum with a length not exceeding lm is 0015mm; The coaxiality of the centerline at both ends of a drum with a length greater than 1m is 002mm.

　　2. The groove ridge of the drum rope is not allowed to have a length exceeding 2% of the circumference of the thread; Defects with a depth greater than 2mm.

　　3. The steel wire rope electric hoist drum has a single air hole or sand hole, with a diameter of no more than 8mm, a depth of no more than 4mm, and no less than 1 place per 100mm length. When there are no more than 5 places on the entire processing surface of the drum, repair welding can be omitted and it can continue to be used.

　　4. The surface roughness of the wire rope electric hoist drum groove is 32. After processing the winding rope groove, the wall thickness difference at each location should not exceed 4mm. If necessary, four holes with a diameter of 4mm and 90 ° each other can be drilled at the same section for inspection.

　　2、 Drum scrapping standard:

　　1. Cracks appear on the surface of the drum

　　2. The wear of the cylinder wall reaches 20% of the original wall thickness;

　　3. The groove is worn out to the point where the steel wire rope cannot be controlled. The wire rope electric hoist is used for equipment installation in mechanical factory workshops and repair shop workshops. Used for material warehouses and freight yards, lifting, stacking, and stacking materials. It can also be used for lifting prefabricated components and cement pipes in the construction industry and pipeline operations. Lifting heavy objects at river docks also involves the operation of wire rope electric hoists.