Clevite MS-2244A-.25MM Main Bearing Set Undersized

The Clevite MS-2244A-.25MM is a precision-engineered main bearing set designed for engine rebuilds requiring 0.25mm undersize bearings. This complete main bearing set provides critical protection for your crankshaft, maintaining the essential oil film separation needed for reliable engine operation.

Understanding Main Bearing Design:

Modern main bearing technology has evolved to maximize oil film thickness and bearing longevity. This bearing set features optimized grooving designed specifically to balance two critical functions: providing adequate oil supply to connecting rod bearings while maintaining maximum load-carrying capacity. The upper main shells incorporate a 180-degree groove to distribute oil to the connecting rods, while the lower shells remain ungrooved to develop the thickest possible oil film under load conditions.

Key Features:

• 0.25mm undersize for precision fitting to reground crankshafts
• Optimized 180-degree upper shell grooving for ideal oil distribution
• Ungrooved lower shells for maximum oil film thickness and load capacity
• TriMetal construction for superior strength and durability
• Engineered to reduce peak oil film pressure and minimize horsepower loss
• Professional-grade quality for performance and OEM replacement applications

Available Series Information:

Clevite offers multiple bearing series to match specific performance requirements. Standard bearings provide excellent service for street and mild performance applications. P-Series bearings feature high eccentricity and full grooving for maximum oil flow in extreme RPM conditions. H-Series bearings offer medium eccentricity with enlarged chamfers for modified crankshafts and broad RPM ranges. K-Series bearings add a proprietary TriArmor moly/graphite surface treatment for additional protection. V-Series bearings utilize lead-indium overlay for enhanced conformability, while M-Series micro bearings provide exceptional conformability for engines experiencing significant crankshaft deflection.

This bearing set ensures proper crankshaft support and lubrication, essential for reliable engine performance and longevity in both stock and modified applications.