ACL Bearings 5M2964H-.025 Race Series Main Bearing Set Oversized - 0.025mm

ACL Race Series performance engine bearings are manufactured to exacting tolerances with micron tolerance machining supported by precision measurement systems that delivers consistent accuracy to key characteristics like wall thickness and crush. These race main bearings are manufactured with a tri-layer metal construction designed to withstand high RPM conditions, high stress loads, and high temperatures.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve bearing support and assist with retention in the housing
• Elimination of flash plating on the back of bearings improves heat transfer and maximizes grip between the bearing and its housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in the formation of hydrodynamic oil films
• 3/4 grooved main bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings
• 0.025mm oversized for precision machined crankshafts
• Upper and lower bearing halves included

Improvements of material, dynamic thickness, heat conduction, oil grooves and oil distribution make ACL one of the leading bearing manufacturers. The unique combination of design, metallurgy and engineering provides Race Series performance bearings with the endurance and capability to perform where others cannot.