Connecting rod bearings are thin-walled components in the shape of half-rings, made from steel strips coated with layers of anti-friction materials based on tin, lead, or aluminum. They are installed in the lower end of the connecting rod and contact the crankshaft’s connecting rod journals, functioning as sliding bearings. This reduces friction between moving parts and ensures the free rotation of the crankshaft.

The primary function of connecting rod bearings is to protect the crankshaft’s connecting rod journals from premature wear and damage, thereby extending the engine’s lifespan.

Connecting rod bearings are crucial for the engine’s operation, as they help convert the pistons’ reciprocating motion into the crankshaft’s rotation, which is the basis of a piston engine’s operation.