What does the +0.50mm size mean for these bearings?

The +0.50mm designation means these bearings are designed to fit crankshaft main journals that have been machined down by 0.50mm. This is common during engine rebuilds to correct wear or imperfections on the crankshaft.

Why are main bearings important in an engine?

Main bearings support the crankshaft within the engine block. They create a precise clearance for the crankshaft to rotate in, while also providing a channel for oil to lubricate the surfaces, reducing friction and wear.

What is the overlay material mentioned?

King Engine Bearings uses a unique overlay material designed to help the bearings withstand the pressures and stresses they encounter during engine operation, contributing to their longevity.

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Specifications

Brand: King Engine Bearings
Part #: MB621MC0.5
UPC: 611500625060

King Engine Bearings Ford 415 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Ford 415 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-415-size-0-50mm-main-bearing-set-t14-771062
Price: 130.39 USD
Availability: BackOrder

$130.39

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Main bearing set for Ford 415 engines.
Size is +0.50mm, for use with machined crankshaft journals.
Features King's unique overlay material for durability.

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About this part

Product Details

King Engine Bearings is known for making solid engine bearings, and this Main Bearing Set for Ford 415 engines is no different. If you're rebuilding the bottom end of your Ford 415, these bearings are a key component to ensure your crankshaft spins smoothly and stays properly aligned within the engine block.

This set is specifically sized at +0.50mm, meaning it's intended for use when the main journals on your crankshaft have been machined down by 0.50mm to clean them up or correct wear. Using the correct undersize or oversize bearing is critical for maintaining proper oil clearance, which is essential for lubrication and preventing premature wear. King uses a unique overlay material that helps these bearings handle the stresses of engine operation.