The process refers to the production activity of removing 1kg of steel using turning processes. Precision turning mainly removes a small portion of the machining allowance from the workpiece surface, and usually has higher requirements for product dimensions and surface roughness. Therefore, the cutting depth and feed rate should be as small as possible. If there is no clear weight of steel removed during the precision turning process, the average assumption that "producing 1kg of final product generates 0.124kg of steel waste" can be used. The data originates from the production processes of bearings, rolls, gearshafts, radiant tubes, pumps, sleeves, and other mechanical and electrical equipment accessories.