ACL Bearings 7M617P-40 Main Bearing Set Undersize - 0.040

The ACL Bearings 7M617P-40 is a precision-engineered crankshaft main bearing set designed for engine rebuilding and performance applications. This set features 0.040" (1.0mm) undersize bearings to accommodate reground crankshafts, making it an essential component for restoring proper oil clearances in worn engines.

Key Features:

• Precision 0.040" undersize for reground crankshaft journals
• Advanced bimetal aluminum alloy construction for enhanced durability
• Electroplated overlay with copper composition for superior load distribution
• Engineered to OEM specifications for reliable fitment and performance
• Manufactured with precision tolerances for proper oil clearance
• Suitable for standard duty street and performance applications

ACL Bearings has been manufacturing precision engine bearings in Tasmania, Australia for over 70 years, earning a global reputation for quality, robust metallurgy, and innovative engineering. Each bearing set undergoes strict quality control to ensure dimensional accuracy and metallurgical integrity. The advanced bearing design provides improved eccentricity to compensate for bore distortion during operation while assisting in the formation of proper hydrodynamic oil film for reliable engine protection.