Clevite MS-961P Engine Crankshaft Main Bearing Set

The Clevite MS-961P is a high-performance main bearing set designed to deliver superior lubrication and durability in demanding engine applications. This bearing set utilizes advanced engineering principles to optimize oil film thickness and crankshaft support, ensuring reliable performance under extreme conditions.

Advanced Bearing Design:

Modern bearing technology has evolved beyond the full-groove designs of early engines. This bearing set features optimized grooving that balances oil delivery to connecting rods while maximizing the oil film thickness that separates the bearing surface from the crankshaft. The upper main shells retain a 180-degree groove to supply oil to the connecting rods, while the lower shells remain ungrooved to provide the thickest possible oil film where loads are highest. This design provides superior bearing life and a greater safety margin compared to older full-grooved configurations.

Key Features:

• Optimized groove design for maximum oil film development and bearing protection
• Upper shells with 180-degree groove for efficient oil delivery to connecting rods
• Ungrooved lower shells for superior load-carrying capacity
• TriMetal construction for exceptional strength and durability
• Engineered to minimize horsepower loss and peak oil film pressure
• Reduced overlay thickness to prevent overlay fatigue
• High crush design for maximum bearing retention

Performance Series Options:

Clevite offers multiple bearing series to match specific engine requirements. The P-Series features maximum eccentricity and full-groove mains for high-RPM applications with severe rod bore distortion. H-Series bearings provide medium eccentricity with enlarged chamfers for increased fillet clearance, ideal for NASCAR-type racing and medium to high RPM engines. K-Series bearings incorporate proprietary moly/graphite TriArmor coating for enhanced protection during startup and high-load conditions. V-Series bearings utilize lead-indium overlay for superior conformability, while M-Series micro bearings offer a thick babbitt lining for extreme crankshaft deflection scenarios.

This main bearing set is engineered for professional engine builders and performance enthusiasts who demand precision-manufactured components that deliver consistent, reliable performance under the most demanding conditions.