Federal Mogul 4418M30 Engine Crankshaft Main Bearing Set 0.030 in. Undersize

The Federal Mogul 4418M30 is a complete crankshaft main bearing set engineered for engines whose crankshaft main journals have been reground to 0.030 inches undersize. Manufactured under Federal Mogul's trusted Sealed Power brand, this set is a go-to solution for professional engine rebuilders and machine shops performing crankshaft restoration work.

Federal Mogul main bearings are precision-manufactured to exacting tolerances, ensuring correct oil clearance, proper crush fit, and reliable crankshaft support after a standard 0.030" regrind. The bearings feature a steel-backed construction with a carefully engineered bearing lining material selected to balance wear resistance, fatigue strength, and corrosion resistance for long-term durability.

Key Features:

• 0.030 in. undersize — designed for use with crankshafts reground 0.030" under nominal journal diameter
• Steel-backed bearing shells for superior crush and housing bore retention
• Precision-engineered oil clearances for optimal lubrication and crankshaft protection
• Manufactured to OEM dimensional specifications for proper fit and function
• Complete set includes all main bearing shells required for a full engine rebuild
• Produced by Federal Mogul under the Sealed Power product line — a trusted name in engine bearings

This main bearing set is the correct replacement when a crankshaft has been machine-ground and requires undersize bearings to restore proper oil clearance. Always verify crankshaft journal diameter with a micrometer before ordering to confirm the correct undersize dimension.