Clevite MS-829A-30 Engine Crankshaft Main Bearing Set

The Clevite MS-829A-30 is a high-performance engine crankshaft main bearing set designed for demanding automotive applications. This precision-engineered bearing set provides critical lubrication and support for the crankshaft while maintaining optimal oil film thickness for maximum durability and performance.

Key Features:

• TriMetal bearing construction for superior strength and durability
• Optimized bearing grooving design for proper oil distribution to connecting rods
• High crush design ensures maximum bearing retention in the housing
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Upper shell features 180-degree groove for connecting rod oil supply
• Ungrooved lower shells maximize oil film thickness in high-load areas
• Hardened steel backing provides exceptional strength and fretting resistance

Application Notes:

This bearing set utilizes proven main bearing groove technology. The upper shells feature a 180-degree groove that effectively supplies oil to the connecting rod bearings while maintaining optimal oil film development on the crankshaft journal. The lower shells remain ungrooved to maximize load-carrying capacity and bearing life in high-stress areas. This design provides the best balance between adequate rod oiling and superior main bearing performance.

Performance Advantages:

Clevite main bearing sets are engineered to maintain a consistent oil film between the bearing surface and crankshaft journal during rotation. The strategic groove placement ensures connecting rods receive adequate lubrication without compromising the oil film integrity in critical load zones. This results in reduced horsepower loss, lower peak oil film pressure, and extended bearing service life compared to fully-grooved designs.

Ideal for performance engine builds, racing applications, and high-RPM operations where bearing reliability and precision clearances are essential for engine longevity and consistent power output.