King Engine Bearings MB5836SX025 Main Bearing Set Undersize - 025mm

The King Engine Bearings MB5836SX025 is a precision-engineered main bearing set designed for OEM replacement and performance engine rebuilding applications. This set features King's SI-Series aluminum-based bearing material strengthened with 2.5-3% silicon content, specifically formulated for medium-load engines and nodular cast iron crankshafts.

Key Features:

• SI-Series bi-metal construction with aluminum-silicon alloy bearing surface
• .025mm (.001 inch) crankshaft undersize for proper fitment on reground crankshafts
• Precision tolerance control to within ±.0001 inch for consistent oil clearance
• Improved crankshaft finish accommodation reduces microscopic ferrite peak damage
• Enhanced embeddability for superior protection against contaminant damage
• 100% lead-free construction for environmental compliance and user safety
• Complete main bearing set (typically 5 bearings per set)

King SI-Series bearings are engineered for aftermarket gasoline and diesel engine rebuilds, particularly excelling with factory crankshafts. The aluminum-silicon alloy construction provides excellent wear resistance and load-carrying capacity while maintaining superior embeddability to protect against microscopic debris in the oil system. These bearings deliver improved oil clearance characteristics that reduce operating noise, minimize vibration, and extend engine life.

Every King bearing is manufactured in-house using proprietary production machinery and undergoes rigorous quality control throughout the manufacturing process. The .025mm undersize designation indicates these bearings are designed for crankshafts that have been machined .025mm (.001 inch) undersize from standard specifications.