Clevite MS-1806AL-.50MM High Performance Main Bearing Set .50mm Undersize

The Clevite MS-1806AL-.50MM is a precision-engineered main bearing set designed for performance and racing applications. This set features .50mm undersize bearings to accommodate reground crankshafts, providing optimal clearances for high-performance engine builds.

Main Bearing Grooving Technology:

Clevite's engineering research has proven that a 180-degree groove in the upper main shell provides the best overall bearing performance. This design maintains optimal oil film thickness while still supplying adequate lubrication to connecting rod bearings. The upper shells feature this proven groove design, while the lower shells remain ungrooved to maximize load-carrying capacity and oil film development. This configuration allows the crankshaft to develop and maintain a thicker protective oil film, similar to how a tire hydroplanes on wet pavement.

Key Features:

• TriMetal bearing construction with copper-lead lining and lead-tin-copper overlay
• Upper shells with optimized 180-degree oil groove for rod bearing lubrication
• Ungrooved lower shells for maximum load capacity and oil film thickness
• High crush design ensures excellent bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Enlarged chamfers provide superior crankshaft fillet clearance
• .50mm undersize for use with reground crankshafts

Performance Series Options:

Clevite offers multiple performance bearing series to match specific engine requirements. The AL suffix indicates this is part of Clevite's high-performance lineup, engineered with features like optimized eccentricity for proper contact patterns, hardened steel backing for strength, and precision manufacturing for consistent clearances. These bearings are designed without flash plating to ensure proper seating and feature enlarged chamfers to accommodate oversize crankshaft fillets common in performance applications.

Applications:

Ideal for performance rebuilds, racing engines, and high-RPM applications where precise bearing clearances and maximum durability are critical. The .50mm undersize dimension makes this set perfect for crankshafts that have been ground .50mm undersize to remove wear or damage.