Clevite MS-2275A Engine Crankshaft Main Bearing Set

The Clevite MS-2275A is a precision-engineered crankshaft main bearing set designed for high-performance and racing applications. This bearing set features Clevite's renowned TriMetal construction, providing exceptional strength, durability, and wear resistance under demanding operating conditions.

Key Features:

• TriMetal bearing construction for superior strength and longevity
• Optimized groove design to maximize oil film thickness and bearing life
• High crush design for maximum bearing retention
• Reduced overlay thickness to prevent overlay fatigue
• Available in multiple series configurations to match specific performance requirements
• Precision-manufactured to OEM specifications with performance enhancements

Performance Design:

Clevite main bearings utilize an optimized 180-degree groove in the upper shell, which has been proven through extensive testing to provide the best overall bearing performance. This design maintains proper oil supply to connecting rod bearings while maximizing oil film thickness in critical load zones. The upper bearing shell features grooves to distribute oil to the connecting rods, while the lower shell remains ungrooved to support a thicker protective oil film where loads are highest.

Series Options:

Clevite offers multiple bearing series to address specific engine requirements. P-Series bearings feature high eccentricity with full grooving for maximum oil flow, hardened steel backs, and are ideal for extreme RPM applications where severe rod bore distortion occurs. H-Series bearings provide medium eccentricity with enlarged chamfers for increased fillet clearance, developed for NASCAR and competition engines operating in medium to high RPM ranges. K-Series (TriArmor) bearings incorporate a proprietary moly/graphite surface treatment with PTFE for enhanced protection during start-up and under high-load conditions. V-Series bearings feature lead-indium overlay for improved conformability. M-Series (Micro) bearings utilize a .006" thick babbitt lining on hardened steel backs, offering exceptional conformability for engines experiencing severe crankshaft deflection.

Application Notes:

Select the appropriate bearing series based on your engine's specific requirements, operating RPM range, crankshaft fillet dimensions, and bearing contact pattern analysis. Proper bearing selection ensures optimal oil film development, minimizes wear, and maximizes engine reliability under performance conditions.