4955872
Crankshaft Thrust Bearing
Cummins®

A crankshaft thrust bearing is a component of an engine's rotating assembly that helps to control the axial movement (end-to-end movement) of the crankshaft. The 4955872 model is a specific type of thrust bearing designed for use in trucks. As the crankshaft rotates, it exerts force in both directions, and this force can cause excessive wear on other components if not properly controlled. The thrust bearing consists of two halves that sandwich the crankshaft and are located at either end of the engine block's main bearing saddle. These halves are typically made from a durable material such as bronze or steel, and they allow for smooth, low-friction movement of the crankshaft while preventing excessive axial play. By reducing wear on other components and ensuring proper alignment of the crankshaft, a high-quality thrust bearing like the 4955872 can help to extend engine life and improve performance.