King Engine Bearings MB5889SX0.5 Main Bearing Set Undersize - 0.50mm

The King Engine Bearings MB5889SX0.5 is a precision-manufactured main bearing set ground to a 0.50mm undersize specification, designed for engine rebuilds requiring oversized crank journals or re-ground crankshafts. King Engine Bearings is a globally recognized OEM and performance bearing supplier, trusted by professional engine builders and motorsport teams worldwide.

Key Features:

• 0.50mm Undersize: Engineered for crankshafts that have been machined 0.50mm under standard journal diameter
• SX Series Construction: Features King's advanced tri-metal bearing construction with a steel backing, copper-lead or aluminum alloy intermediate layer, and a precision overlay for superior surface compatibility
• High Eccentricity Design: King's proprietary eccentricity profile promotes optimal oil film distribution under load, reducing wear at startup and under high-stress operating conditions
• Precision Tolerances: Manufactured to tight dimensional tolerances for consistent crush, proper oil clearance, and reliable seating in the bearing housing
• Corrosion-Resistant Overlay: The bearing surface overlay resists corrosion from combustion byproducts and acidic oil contamination
• OEM-Grade Quality: Meets or exceeds original equipment specifications for reliable street, towing, and performance applications

King Engine Bearings are produced in ISO-certified manufacturing facilities and are a preferred choice for both OEM supply and the high-performance aftermarket. The MB5889SX0.5 is sold as a complete main bearing set and is an ideal solution when a standard-size bearing will not provide the correct oil clearance due to crankshaft grinding.