ACL Bearings 5M2817-.75 Main Bearing Set Undersize - 0.75mm

The ACL Bearings 5M2817-.75 is a high-quality main bearing set designed for engines with crankshafts that have been ground 0.75mm (approximately 0.030 inch) undersize. This bearing set provides the precise fitment needed to maintain proper oil clearances and support crankshaft rotation on reconditioned engines.

Key Features:

• 0.75mm undersize specification for reground crankshafts
• Precision-manufactured bearing shells with increased wall thickness to accommodate smaller journal diameters
• High-strength aluminum alloy construction with proper metallurgy for durability
• Designed to maintain optimal oil film thickness and bearing clearance
• Manufactured to ISO certified quality standards

ACL Bearings has over 70 years of experience manufacturing precision engine bearings in Tasmania, Australia. Their bearings are trusted by OEM manufacturers and engine builders worldwide for both standard replacement and high-performance applications. When replacing bearings on a crankshaft that has been machined undersize, selecting the correct bearing dimension is critical to engine longevity and proper lubrication.

Application Note: Undersize bearings are used when crankshaft main journals have been ground down to remove wear or damage. The thicker bearing walls compensate for the reduced journal diameter, restoring proper clearances. Always verify crankshaft journal measurements before installation to ensure correct bearing selection.