ACL Bearings 5M7788HX-STD Race Series Main Bearing Set Standard Size

The ACL Race Series 5M7788HX-STD is a high-performance main bearing set engineered with a unique combination of design, metallurgy and engineering to deliver what drivers expect from performance trimetal engine bearings. This standard size bearing features F780 tri-metal construction with upper and lower bearing halves.

Key Features:

• HX-series bearings are 0.0005 inch thinner per half to provide 0.001 inch extra clearance for standard sized crankshafts
• ACL Duraglide F780 heavy duty tri-metal copper-lead material suits every performance requirement and is ideal for higher load applications
• Hardened steel backs improve support of bearing lining and assist with bearing retention in the housing
• Designed to withstand higher RPM conditions
• Improvements in material, dynamic thickness, heat conduction, oil grooves and oil distribution

Technical specifications include a maximum shaft size of 1.7717 inches (45mm), maximum tunnel size of 1.9175 inches (48.705mm), and vertical oil clearance ranging from 0.0024 to 0.0045 inches. ACL Race Series bearings are standard components in race engines that have set records and won championships from sport compact drift racing to NASCAR, IHRA and NHRA competitions.