Clevite MS-1429G Engine Crankshaft Main Bearing Set

The Clevite MS-1429G is a high-performance engine crankshaft main bearing set designed for demanding applications. This undersize bearing set includes .25mm and .50mm undersize bearings, plus a .15mm oversize length flanged thrust bearing for precise crankshaft positioning and optimal oil clearance control.

Key Features:

• Tri-Metal construction for superior strength and durability
• 180-degree upper shell grooving for optimal oil distribution to connecting rods
• Ungrooved lower shells maintain maximum oil film thickness under load
• High crush design ensures positive bearing retention
• Reduced overlay thickness prevents overlay fatigue
• Includes flanged thrust bearing with .15mm oversize length
• Available in .25mm and .50mm undersize for reground crankshafts

Engineering Design:

Clevite main bearings utilize optimized grooving technology based on extensive performance testing. The 180-degree groove in the upper shell provides essential oil supply to connecting rod bearings while the ungrooved lower shell maintains the thickest possible oil film where loads are highest. This design delivers superior bearing life and increased safety margin compared to older full-grooved designs.

Applications:

Ideal for performance rebuilds, racing engines, and applications requiring undersize bearings due to crankshaft journal machining. The included oversize thrust bearing accommodates increased crankshaft endplay control.

Clevite Performance Series Guide:

P-Series: Maximum eccentricity and oil flow, full grooved mains, hardened steel backs, ideal for extreme RPM applications and preventing rod bearing oil starvation.

H-Series: Medium eccentricity with enlarged chamfers for oversize fillets, available in 180° or 360° groove configurations, best all-around choice for most performance applications.

K-Series (TriArmor): Features proprietary moly/graphite coating with PTFE for enhanced start-up protection and high-load durability across broad temperature ranges.

V-Series: Lead-indium overlay for superior conformability, ideal when prior experience shows preference for this overlay type.

M-Series (Micro): .006" thick babbitt lining on hardened steel, maximum conformability for engines with severe crankshaft deflection and edge loading conditions.