What is the bearing locating groove on the engine crankshaft connecting rod used for?

The locating groove of the bearing bush prevents the bearing bush from rotating in the shaft hole.

An alloy layer is injected into the inner surface of the bearing bush to form a friction pair with the shaft, so as to reduce the friction resistance and wear when the engine works. The outer surface of the bearing bush is steel back, which ensures that the bearing bush has enough elasticity and will not be deformed under impact load, and it is better matched with the shaft hole. Combined with the stop function of the positioning groove, the normal operation of the bearing bush can be ensured.