Clevite MS-1432HX High Performance Engine Crankshaft Main Bearing Set

The Clevite MS-1432HX is a high-performance engine crankshaft main bearing set designed for competition and performance applications. This H-Series bearing set features optimized 180-degree upper shell grooving for maximum oil film thickness while providing adequate oil supply to connecting rod bearings.

H-Series Performance Features:

• Medium eccentricity design for optimal bearing contact patterns
• High crush construction for maximum bearing retention
• Hardened steel back for added strength and fretting resistance
• Thin overlay to prevent overlay fatigue (hen tracking)
• Enlarged chamfers for greater crankshaft fillet clearance
• No flash plating for improved bearing seating
• HX designation indicates 0.001" extra clearance for precision fitting
• 180-degree upper shell grooving for optimal oil film development

Application:

Originally developed for NASCAR-type racing, H-Series bearings are suitable for all types of competition engines operating in medium to high RPM ranges. These bearings work with crankshafts that have oversized fillets and are ideal when you need broader contact patterns than P-Series bearings provide. Contact patterns should ideally cover 2/3 to 3/4 of the bearing surface for optimal performance.

Technical Advantages:

The 180-degree groove design in the upper main shell provides the best overall performance for high-performance applications. This configuration maintains oil supply to connecting rods while allowing the lower bearing shell to develop a thicker oil film for improved load capacity and bearing life. The ungrooved lower shell maximizes the safety margin under high loads by maintaining continuous oil film thickness.

Construction:

These bearings utilize Clevite's legendary TriMetal construction, combining a hardened steel backing with a copper-lead intermediate layer and a lead-tin-copper overlay. This three-layer design provides exceptional strength, durability, and conformability for demanding performance applications.

The MS-1432HX is an excellent starting point if you're unsure which performance bearing series to use, as H-Series bearings offer the best balance of characteristics for most high-performance and racing applications.