ACL Bearings 5M429P-10 Small Block Chevy Small Journal Main Bearing Set .010" Undersize

The ACL Bearings 5M429P-10 is a precision-engineered main bearing set designed specifically for Small Block Chevy engines with small journal crankshafts. This set is manufactured to .010" undersize specifications, making it ideal for crankshaft regrinding and engine rebuilding applications on 265, 283, 302, and 327 cubic inch V8 engines.

Advanced Tri-Metal Construction:

ACL's P Series bearings feature a proven tri-metal design that combines a steel backing with a copper-lead alloy intermediate layer and an advanced overlay material. This construction provides the optimal balance of strength, durability, and seizure resistance needed for reliable engine operation. The softer bearing material protects your crankshaft and engine block from wear while allowing proper lubrication through a thin oil film that lets the crank "float" and reduces friction.

Key Features:

• Precision .010" undersize for machined crankshafts
• Tri-metal construction for superior strength and wear resistance
• Designed specifically for small journal Small Block Chevy applications
• Manufactured to exact tolerances for consistent bearing clearances
• Half-groove design for optimal oil distribution
• Prevents crankshaft oscillation and premature wear

About ACL Bearings:

With over 70 years of engineering excellence, ACL is an Australian designer and manufacturer trusted by OEM suppliers and performance engine builders worldwide. Their precision machining capabilities and rigorous quality control processes ensure each bearing set meets exacting standards for professional rebuilds and high-performance applications.

This main bearing set provides the critical support needed to maintain proper crankshaft alignment and prevent damaging oscillations that can occur as the engine moves out of balance during operation. ACL bearings are the choice of professional engine builders who demand consistency, reliability, and performance.