What is a Woodruff key used for?

A Woodruff key is a semicircular key that fits into a matching slot on a shaft and a component. Its primary purpose is to prevent the component, such as a flywheel or pulley, from rotating freely on the shaft, ensuring proper timing and alignment.

What material are these keys made from?

These S&S Cycle Woodruff keys are made from steel, which provides the necessary strength and durability for engine applications.

Why does this come as a 5-pack?

The 5-pack is convenient for mechanics and enthusiasts who may be working on multiple bikes, performing complex engine rebuilds, or simply want to have spares readily available for future repairs.

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

S&S Cycle .094in x .500in x .491in Woodruff Key - 5 Pack

Specifications

Brand: S&S Cycle
Part #: 50-1008
UPC: 50-1008

S&S Cycle .094in x .500in x .491in Woodruff Key - 5 Pack

Name: S&S Cycle .094in x .500in x .491in Woodruff Key - 5 Pack
Brand: S&S Cycle
Price: 11.06 USD
Availability: InStock

$11.06

On Backorder — Expected to ship by May 10, 2026

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

S&S Cycle steel Woodruff key, 5-pack. Fits many Harley-Davidson models.

Key Features

Fits 11+ vehicle make/model combinations.
Measures .094 inches thick, .500 inches long, and .491 inches in diameter.
Constructed from steel for durability.
Comes in a convenient 5-pack for multiple uses or spares.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

This is a 5-pack of S&S Cycle Woodruff keys, measuring .094 inches thick, .500 inches long, and .491 inches in diameter. These small but important steel keys are used to positively locate and secure components like flywheels or pulleys onto a shaft, preventing them from rotating independently. They are essential for maintaining proper timing and alignment in many engine applications.

Crafted from durable steel, these keys are built to withstand the stresses of engine operation. Having a 5-pack means you'll have spares on hand for multiple jobs or future repairs, which can be a real time-saver when you're in the middle of an engine rebuild or component replacement. These are a popular choice for Harley-Davidson motorcycles from the late 70s through the late 80s, ensuring you have the correct hardware for those classic builds.