修配时制作平键是用锻制的毛坯经铣、刨或由钳工锉配而成。这些加工工艺工序繁琐;效率低。尤其是加工心轴上的平键时,铣、刨及钳工锉配装夹均较困难。因此,对12mm以下平键可用切削方法制作,方法是; When repairing the flat key is made by forging rough by milling, planing or fitter file with. These processes complicated process; inefficient. Especially in the processing of flat key on the mandrel, milling, planing and fitter file mounting clamps are more difficult. Therefore, flat key available 12mm available cutting method, the method is;