What does '0.050 inch undersize' mean for these bearings?

This means the bearings are manufactured to be 0.050 inches smaller in diameter than standard size. This is typically used when the engine's crankshaft journals have been machined down (ground) by 0.050 inches to remove wear or damage.

What is the bimetal construction with an aluminum base?

This construction uses a strong steel backing for structural integrity and a bimetal overlay, which includes an aluminum alloy. This design offers good conformability to the crankshaft journal and excellent heat dissipation properties.

Does this set include all the main bearings needed for an engine rebuild?

Yes, this is a complete main bearing set designed to replace all the main bearings in the specified Ford engines. Always refer to your engine's service manual for the exact number of bearings and their installation procedure.

King Engine Bearings Ford 330/352/360/390/410/428 Engine (Size 050) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB559AM050
UPC: 611500411458

King Engine Bearings Ford 330/352/360/390/410/428 Engine (Size 050) Main Bearing Set

Name: King Engine Bearings Ford 330/352/360/390/410/428 Engine (Size 050) Main Bearing Set
Brand: King Engine Bearings
Price: 55.35 USD
Availability: InStock

$55.35

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King Engine Bearings MB559AM050 main bearing set for Ford 330-428 engines. This is a 0.050 inch undersize set.

Key Features

Fits a wide range of Ford 330, 352, 360, 390, 410, and 428 engines.
This is a 0.050 inch undersize main bearing set.
Features a bimetal construction with an aluminum base for improved heat transfer.
Designed for durability and reduced friction in performance and daily driver applications.
King Engine Bearings is a popular manufacturer known for their engine bearing products.

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Will this fit your vehicle?

Product Details

If you're rebuilding a Ford engine like the 330, 352, 360, 390, 410, or 428, this main bearing set from King Engine Bearings is a solid option. These bearings are built with a bimetal construction, meaning they have an aluminum base, which helps with heat transfer and overall performance in these classic Ford V8s. This particular set is sized 0.050 inches undersize, which is important to note if you've had your crankshaft ground to match. King is a well-known name in engine bearings, and this set is designed to fit right into a wide range of applications, from Ford trucks and cars to even some AMC and Chevrolet models from the late 60s and early 70s.

The bimetal construction is a key feature here. It uses an aluminum alloy overlay on a steel backing, offering good conformability to the crankshaft journal while maintaining strength. This design helps to reduce friction and wear, contributing to a longer engine life. King has been making bearings for a long time, and their focus on materials and manufacturing means you're getting a well-built part that's ready to go into your freshly machined block.