Excavator Pump Parts Bearing Shell Kayaba PSVL-54 Excavator Parts

Excavator Pump Parts Bearing Shell Kayaba PSVL-54 Excavator Parts

Bearing shells are core components of plain bearings. They operate by forming an oil film with lubricating oil, and are widely used on engine crankshafts, connecting rods and hydraulic pump rotating shafts.

Support the rotating shaft Bear the crankshaft and connecting rod journals, withstand huge impact loads generated by engine combustion, and enable stable rotation of the shaft.

Reduce friction, resist wear and separate metal surfaces High‑pressure engine oil forms an oil film between the bearing shell and the shaft. The shaft and shell do not make direct contact, greatly cutting frictional resistance and preventing seizure caused by dry friction.

Protect expensive rotating shafts (sacrificial component) The surface layer of bearing shells is made of soft alloy. In cases of oil shortage or contaminated oil with impurities, the bearing shell wears first. This protects the higher‑cost crankshaft; only the bearing shell needs to be replaced instead of the crankshaft.

Heat conduction and dissipation Heat generated by friction transfers through the bearing shell to the engine oil and is carried away, preventing component ablation caused by local high temperatures.

Evenly distribute lubricating oil Oil holes and grooves on bearing shells guide the flow of pressurized oil, continuously supplying lubricant to friction surfaces and delivering oil upward to lubricate other components.

Vibration buffering and damping The oil film provides cushioning, absorbing vibration and impact during engine operation and lowering running noise.

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