Clevite MS-1947A-30 High Performance Main Bearing Set

The Clevite MS-1947A-30 is a precision-engineered 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 extreme operating conditions.

Key Features:

• TriMetal bearing construction with hardened steel backing for maximum strength
• Optimized 180-degree upper shell grooving for ideal oil distribution
• High crush design ensures superior bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Enlarged chamfers provide increased crankshaft fillet clearance
• No flash plating for improved bearing seating and bedding-in
• Medium eccentricity design for optimal contact patterns

Performance Benefits:

This bearing set utilizes an optimized 180-degree groove configuration in the upper main shell, which research has proven to be the most effective design for performance engines. This configuration maximizes oil film thickness on the loaded lower bearing surface while providing adequate oil supply to connecting rod bearings. The design delivers lower peak oil film pressures and reduced horsepower loss compared to extended groove patterns.

Application:

Ideal for medium to high RPM racing engines, including NASCAR-type applications and other competitive motorsports. The bearing's medium eccentricity and enhanced chamfer design makes it compatible with performance crankshafts featuring oversized fillets. Contact patterns typically cover 2/3 to 3/4 of the bearing surface for optimal load distribution.

Technical Specifications:

• Material: TriMetal construction (steel back, copper-lead intermediate layer, lead-tin-copper overlay)
• Upper shell: 180-degree oil groove
• Lower shell: Ungrooved for maximum oil film development
• Designed for .030" undersize crankshaft journals

The Clevite MS-1947A-30 represents decades of bearing engineering expertise, delivering the reliability and performance demanded by professional engine builders and racing teams worldwide.