Clevite MS-1947A-10 High Performance Engine Crankshaft Main Bearing Set

The Clevite MS-1947A-10 is a precision-engineered main bearing set designed for high-performance and racing applications. This bearing set features advanced tribology engineering to maximize crankshaft support while optimizing oil delivery to connecting rod bearings.

Bearing Design Philosophy:

Modern main bearing technology has evolved to remove grooving from lower main shells, allowing for a thicker oil film and improved bearing life. The upper main shells retain a 180-degree groove to supply connecting rods with oil—this configuration has been proven to provide the best overall performance in demanding applications. Extending grooves beyond 180 degrees actually reduces bearing performance while increasing horsepower loss and peak oil film pressure.

Key Features:

• High crush design for maximum bearing retention
• Reduced overlay thickness to prevent overlay fatigue
• Engineered eccentricity for optimal load distribution
• Precision tolerances for performance engine builds
• TriMetal construction for strength and durability
• Optimized oil groove configuration for rod bearing lubrication

Clevite Performance Series Overview:

Clevite offers multiple performance bearing series, each engineered for specific applications. P-Series bearings feature maximum eccentricity with full grooving for extreme oil flow, ideal for high-RPM applications showing severe rod bore distortion. 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 (TriArmor) bearings feature proprietary moly/graphite coating with PTFE carrier material for enhanced protection during startup and high-load conditions. V-Series bearings utilize lead-indium overlay for superior conformability. M-Series (Micro) bearings offer .006-inch thick babbitt lining for maximum conformability in engines experiencing severe crankshaft deflection.

All performance series rod bearings feature hardened steel backs for added strength and fretting resistance. Extra clearance options are available across series for select fitting and custom clearance requirements.