Main bearings are the precision bearing inserts that support the crankshaft within the engine block, allowing it to rotate smoothly under load. They are vital for maintaining proper oil clearance and crankshaft alignment. Worn main bearings cause low oil pressure, engine knock, and can lead to crankshaft scoring. We offer a full range of main bearing sets in standard and undersizes for crankshaft regrinding. Manufactured from high-grade materials with optimal clearance, our bearings ensure stable crankshaft support, effective lubrication, and long-lasting durability for a smooth-running engine.