ACL Bearings 5M1959HC-STD High Performance Main Bearings

ACL Bearings 5M1959HC-STD main bearings deliver precision-engineered engine protection with advanced tri-metal construction. These standard size main bearings feature ACL's proprietary polymer coating technology for enhanced durability and reduced friction during critical engine start-up and high-load conditions.

Key Features:

• Tri-metal construction with steel backing, copper-lead intermediate layer, and polymer coating
• Standard (STD) size for stock crankshaft journals
• High crush design ensures proper bearing retention and oil sealing
• Engineered eccentricity promotes optimal oil film development
• Superior fatigue resistance for high-performance and racing applications
• Precision machined to strict OEM tolerances

ACL Race Series bearings are manufactured using state-of-the-art processes and materials to provide exceptional load capacity and longevity. The HC (High Clearance) designation indicates these bearings are designed with slightly larger oil clearances for modified engines or applications requiring increased oil flow. Ideal for performance rebuilds, racing engines, and demanding street applications.