ACL Bearings 5M1295HX-STD Race Series Tri-Metal Main Bearings

ACL Race Series Main Bearings are engineered for high-performance applications where reliability under extreme conditions is critical. These tri-metal main bearings feature both upper and lower shells designed to withstand elevated RPM and the punishing demands of racing and performance engines.

Key Features:

• High-strength overlay plate with reduced thickness for improved fatigue resistance and longevity
• Hardened steel backing on all bearings to enhance support of the bearing lining and improve retention in the housing
• Increased crush for superior bearing retention and stability
• Flash plating eliminated on bearing backs to maximize heat transfer and improve grip between bearing and housing
• Increased eccentricity to compensate for bore distortion at high RPM and promote hydrodynamic oil film formation
• 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 for precise bearing clearance control
• Enlarged ID chamfers on bearing edges to accommodate large fillet radius performance crankshafts

The ACL Race Series combines advanced metallurgy with precision engineering to deliver the durability and performance demanded by high-RPM racing engines. Tri-metal construction provides excellent conformability, embedability, and resistance to fatigue.