键联接作为常用联接方式在机械传动中使用非常普遍。但由于制造及使用方面的原因，现场设备经常因配合过松、调整失衡、偏心振动、启动冲击等因素，致使键及键槽磨损变形，导致传动失效。这时一般采取重做键槽，重新配键，或更换原轴等措施即可解决。但某些特殊情况，如部件体 It is very common for the key to be used in a mechanical transmission as a common connection. However, due to the reasons of manufacture and use, the on-site equipment is often worn down due to mismatch, imbalance adjustment, eccentric vibration, impact of start-up and other factors, resulting in wear and deformation of the key and the keyway, resulting in transmission failure. At this time generally redo keyway, re-key, or replace the original axis and other measures can be resolved. However, some special cases, such as parts body