What is the primary function of a crank hub and inner shell?

The crank hub and inner shell assembly connects to the front of the crankshaft and serves as the mounting point for your engine's accessory pulleys. It ensures these accessories are driven at the correct speed relative to the engine's rotation.

Why is a dual keyway design important?

A dual keyway design provides a more secure connection between the hub and the crankshaft. This helps prevent the hub from slipping or spinning on the crankshaft, which is especially important in high-performance or high-stress applications.

What material is this crank hub made from?

This crank hub and inner shell is made from steel, chosen for its strength and ability to withstand the forces involved in engine operation.

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Est. 1957

Specifications

Brand: ATI
Part #: ATI916891
UPC: 800157023675

ATI Crank Hub & Inner Shell - Steel - Chevy BB Int Bal 6 Pulley Holes 2 Keyway

Name: ATI Crank Hub & Inner Shell - Steel - Chevy BB Int Bal 6 Pulley Holes 2 Keyway
Brand: ATI
SKU: ati-ati-crank-hub-inner-shell-steel-chevy-bb-int-bal-6-pulley-holes-2-keyway-t14-361077
Price: 148.36 USD
Availability: BackOrder

$148.36

On Backorder

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Key Features

Fits Chevy big-block engines with internal balance.
Steel construction for strength and durability.
Features six pulley holes for accessory drive configurations.
Includes two keyways for a secure crankshaft connection.
Helps prevent hub spin on the crankshaft.

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About this part

Product Details

ATI is known for making robust performance parts, and this steel crank hub and inner shell is a solid example of their work. Designed for Chevy big-block engines with internal balance, this component is crucial for proper crankshaft function and accessory drive alignment. It features six pulley holes and two keyways, offering flexibility for various pulley setups and ensuring a secure connection to the crankshaft.

This hub and shell assembly is constructed from steel, which offers good strength and durability for demanding engine applications. The dual keyway design helps prevent the hub from spinning on the crankshaft, especially important when dealing with higher horsepower or aggressive engine use. Proper installation of this part ensures that your accessory drives, like the alternator, water pump, and power steering, will spin true and reliably.