Clevite MS-1432A-20 Engine Crankshaft Main Bearing Set

The Clevite MS-1432A-20 is a high-performance engine crankshaft main bearing set designed to provide superior durability and oil film protection in demanding applications. This bearing set features Clevite's proven TriMetal construction, combining a steel backing with a copper-lead alloy interlayer and a lead-tin-copper overlay for optimal strength, conformability, and wear resistance.

Key Features:

• TriMetal construction with steel backing for maximum strength
• Optimized groove design for proper oil distribution to connecting rods
• High crush design ensures positive bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Engineered for high-performance and racing applications
• Upper main shells feature 180-degree grooving for optimal oil flow
• Lower main shells ungrooved to maximize oil film thickness

Clevite main bearing sets are engineered with specific groove configurations to balance connecting rod oil supply with maximum bearing protection. The upper shells provide continuous lubrication to the connecting rods while the ungrooved lower shells maintain the thickest possible oil film where loads are highest. This design delivers superior bearing life and increased safety margins in high-performance engines.

Series Information:

Clevite offers multiple bearing series to match specific engine requirements and operating conditions. The P-Series features maximum eccentricity and full grooving for 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 TriArmor moly/graphite coating for enhanced protection during start-up and high-load conditions. V-Series uses lead-indium overlay for superior conformability, while M-Series features thick babbitt lining for engines experiencing severe crankshaft deflection.

Select the appropriate bearing series based on your engine's RPM range, crankshaft specifications, and bearing contact pattern requirements. Proper bearing selection and installation are critical for optimal engine performance and longevity.