Clevite MS-2208A-.25MM Engine Crankshaft Main Bearing Set

The Clevite MS-2208A-.25MM is a high-performance engine crankshaft main bearing set designed for demanding automotive applications. This precision-engineered bearing set features -.25MM undersize dimensions to accommodate reground crankshafts, providing proper oil clearances for rebuilt and performance engines.

Key Features:

• TriMetal construction with steel backing for exceptional strength and durability
• Optimized 180-degree upper shell grooving design for maximum oil film thickness
• High crush design for superior bearing retention under extreme loads
• Reduced overlay thickness to prevent fatigue and hen tracking
• Engineered oil distribution system for proper connecting rod lubrication
• -.25MM undersize for reground crankshaft applications

Advanced Bearing Design:

Clevite main bearings utilize advanced grooving technology based on extensive performance testing. The upper main shells feature a 180-degree groove that provides optimal oil delivery to connecting rod bearings while maintaining maximum oil film strength. The ungrooved lower shells operate under higher loads and benefit from continuous oil film coverage, resulting in improved load capacity and extended bearing life.

Performance Applications:

This bearing set is ideal for engine rebuilds requiring undersize bearings, performance applications, and racing engines. The TriMetal construction combines a hardened steel backing with a high-strength intermediate layer and wear-resistant overlay, providing the perfect balance of strength, conformability, and durability under high-stress conditions.

Clevite bearings are engineered to maintain proper oil film separation between the bearing surface and crankshaft journal. As the crankshaft rotates, it pulls oil into the loaded bearing area, creating a hydrodynamic film that prevents metal-to-metal contact. The precision-engineered grooving pattern ensures adequate oil supply without compromising film thickness or load capacity.