021HS21725025 MAHLE Crankshaft Bearing Set

MAHLE's Engine Bearings (MPN: 021HS21725025) are precision-engineered components that play a crucial role in the crankcase of various engines. By providing optimal support to the crankshaft, they help maintain engine performance and longevity. Measuring 150.0 x 35.0 x 75.0 mm, these bearings are manufactured in China. Dimensions are provided by the supplier and may include packaging dimensions. Crankshaft bearings are precision components facilitating smooth rotary motion between the crankshaft and engine block. Located within the engine’s main and connecting rod bearing bores, these bearings support significant loads and reduce friction generated by reciprocating piston motion. Typically manufactured from tri-metal or polymer-coated steel, they feature a split design for ease of installation and precise clearance control. Oil grooves and channels within the bearing surface maintain a hydrodynamic oil wedge, preventing metal-to-metal contact. Dimensional accuracy and material hardness are critical for maintaining engine performance and longevity, with variations existing for different engine families and load requirements.