Clevite MS-1706A-.25MM Engine Crankshaft Main Bearing Set

The Clevite MS-1706A-.25MM is a precision-engineered crankshaft main bearing set designed for performance and racing applications. This oversized bearing set features a -.25MM (undersized) specification to accommodate reground crankshafts, providing proper clearances and optimal oil film thickness for rebuilt engines.

Key Features:

• TriMetal bearing construction for exceptional strength and durability
• Optimized 180-degree upper shell grooving for efficient oil delivery to connecting rod bearings
• High crush design ensures maximum bearing retention during high-load operation
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Precision-manufactured to strict tolerances for consistent performance

Engineering Excellence:

Clevite main bearings utilize advanced grooving technology that balances lubrication needs with bearing performance. The upper main shell features a 180-degree groove that supplies oil to the connecting rods while maintaining optimal oil film pressure. The ungrooved lower shell maximizes load-carrying capacity and extends bearing life by providing a thicker, uninterrupted oil film where loads are greatest.

Performance Application:

This bearing set is ideal for engine rebuilds requiring undersized bearings due to crankshaft machining. The -.25MM dimension compensates for material removed during crankshaft grinding, restoring proper bearing clearances. The design provides excellent performance characteristics for street performance, racing, and high-output engine applications where bearing reliability is critical.

Clevite bearings are trusted by engine builders and professional racers worldwide for their consistent quality, precise fitment, and exceptional durability under extreme operating conditions.