ACL Bearings 5M1186HX-STD Race Series Main Bearing Set with Extra Clearance

The ACL Bearings 5M1186HX-STD is a high-performance Race Series main bearing set engineered for demanding motorsports applications. This tri-metal construction features a steel backing layer, copper/lead/tin bearing lining material, and lead/tin/copper overlay, designed to withstand extreme RPM conditions and high cylinder pressures found in race engines.

Key Features:

• .001" extra oil clearance (.025mm) for high-performance applications
• Includes flanged thrust bearing
• Hardened steel backs on all bearings to improve support and bearing retention
• Increased crush for improved bearing retention in the housing
• High strength overlay plate with reduced thickness for improved fatigue properties
• Increased eccentricity to compensate for bore distortion at high RPM
• Enlarged ID chamfers on bearing edges to accommodate large fillet radius on performance crankshafts
• Chamfered bearing edges, non-coated finish

Specifications:

• Bearing Width: 0.8120"
• Standard Bearing Thickness: 0.0778"
• Standard Crank Pin Diameter: 2.2435"
• Standard Housing Diameter: 2.4016"

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, with applications ranging from sport compact drift racing to NASCAR, IHRA, and NHRA competitions. These bearings deliver exceptional strength, forgiveness, and heat transfer characteristics essential for high-performance engine builds.