ACL Bearings 5M8137-.75 Main Bearing Set Undersize - 0.75mm

The ACL Bearings 5M8137-.75 is a precision-engineered crankshaft main bearing set designed for engines requiring 0.75mm (0.030") undersize bearings. This undersize specification is intended for use with crankshafts that have been reground or machined 0.75mm below standard diameter, commonly required during engine rebuilds and performance applications.

Key Features:

• 0.75mm (0.030") undersize for reground crankshafts
• Precision-manufactured in Tasmania, Australia with ISO-certified processes
• Bimetal or trimetal construction for enhanced strength and fatigue resistance
• Hardened steel backing provides superior support and retention
• Advanced metallurgy designed for optimal load distribution and heat dissipation
• Engineered for proper oil clearance with machined crankshaft journals
• Complete set includes all main bearing shells required for installation

ACL Bearings has been manufacturing precision engine bearings for over 70 years and maintains a global reputation for quality, innovation, and performance. These main bearings are suitable for both standard duty rebuilds and demanding performance applications. When installing undersize bearings, always verify crankshaft journal dimensions and check bearing clearances with Plastigauge before final assembly to ensure proper fitment and optimal engine performance.