Clevite MS-2203A High Performance Engine Crankshaft Main Bearing Set

The Clevite MS-2203A is a precision-engineered main bearing set designed to provide superior protection and performance in demanding engine applications. This bearing set utilizes advanced TriMetal construction with optimized groove design to maximize oil film thickness while ensuring proper oil delivery to connecting rod bearings.

Key Features:

• TriMetal bearing construction for exceptional strength and durability
• Optimized 180-degree upper shell grooving for balanced oil flow and film strength
• Ungrooved lower shells for maximum oil film thickness and load capacity
• High crush design for superior bearing retention
• Reduced overlay thickness to prevent fatigue and hen tracking
• Hardened steel backing for added strength and fretting resistance

Performance Design:

This main bearing set features engineering refinements based on extensive performance testing. The upper shells incorporate a 180-degree oil groove that efficiently supplies oil to connecting rod bearings while maintaining optimal oil film pressure. The ungrooved lower shells maximize the hydrodynamic oil film where loads are highest, providing superior protection and extended bearing life compared to older full-groove designs.

Clevite Series Information:

Clevite offers multiple bearing series to match specific engine requirements and operating conditions. The P-Series features high eccentricity and full grooving for maximum rod oiling in extreme RPM applications. H-Series bearings provide medium eccentricity with enlarged chamfers for oversize crankshaft fillets, making them the recommended starting point for most performance builds. K-Series bearings add a proprietary TriArmor moly/graphite coating for enhanced wear protection. V-Series utilizes lead-indium overlay for superior conformability, while M-Series micro bearings feature thick babbitt lining for engines experiencing severe crankshaft deflection.

Proper bearing selection depends on factors including RPM range, crankshaft fillet radius, bearing contact patterns, and oiling system capacity. Contact patterns should ideally cover two-thirds to three-quarters of the bearing surface for optimal performance and longevity.