ACL Bearings 7M1532H-.50 Race Series Tri-Metal Main Bearings

ACL Race Series Main Bearings deliver high-performance tri-metal construction engineered for extreme RPM conditions and racing applications. These precision main bearings feature both upper and lower shells with advanced metallurgy designed to handle the demanding conditions of high-performance and competition engines.

Race-Proven Design Features:

• High strength overlay plate with reduced thickness for improved fatigue properties and durability under sustained high loads
• Hardened steel backing on all bearings to improve support of the bearing lining and enhance retention in the housing
• Increased crush for superior bearing retention and prevention of bearing spin
• Elimination of flash plating on bearing backs to maximize heat transfer through the bearing and improve grip between bearing and housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in formation of hydrodynamic oil films
• 3/4 groove design on main bearings to optimize load-carrying surface area while maintaining proper oil flow to connecting rod bearings
• Tight consistent wall tolerances to help maintain precise bearing clearances for optimal performance
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius found on performance crankshafts

ACL Race Series bearings combine advanced design, premium metallurgy, and precision engineering to deliver the reliability and performance that racing engines demand.