Multiquip EM215 Woodruff Key #406 1/8" x 3/4"

The Multiquip EM215 Woodruff Key #406 1/8" x 3/4" is a genuine OEM component designed for a wide range of Multiquip and Whiteman equipment, including MD80, MD105, HTX, STX, HHN, WRS, WM70S/P, MT85, PRX, and MQD series machines. This small but critical fastening key ensures proper shaft-to-hub alignment across power trowels, rammers, mixers, roller screeds, diaphragm pumps, and water trailers. Sourced directly from Multiquip, part number EM215 meets the same dimensional and material standards as the original component it replaces. Whether you are servicing a ride-on trowel or a mortar mixer, the EM215 is the correct OEM specification key for the application.

Key Features

• OEM Dimensional Accuracy — Manufactured to the exact #406 profile at 1/8" x 3/4", ensuring correct torque transfer and shaft engagement without slippage or play.
• Drop-In Shaft Replacement — Seats directly into the existing keyway slot on compatible shafts with no machining or fitting required, restoring the original drive connection.
• Broad Equipment Compatibility — Fits an extensive range of Multiquip and Whiteman machines including MD80, MD105, HTX44, STX55, HHN, WRS5200, WM70S/P, MT85, PRX, and MQD diaphragm pump series.
• Maintains Positive Drive Engagement — A correctly fitted Woodruff key locks rotating components to the shaft, preventing key shear, hub spin, and the premature wear that follows misalignment.
• Genuine Multiquip OEM Part — Supplied under part number EM215 as an authorized Multiquip replacement, matching the hardness grade and tolerances of the original factory key.

A Woodruff key is a small, semi-circular or rectangular metal key that fits into a mating slot — called a keyway — cut into both a shaft and the hub of a rotating component such as a gear, pulley, or impeller. Its job is to lock the two parts together rotationally so that drive force is transmitted from the shaft to the hub without slipping. When a Woodruff key shears or wears, the connected component can spin freely on the shaft, causing an immediate loss of drive and potential damage to the keyway itself. Replacing a worn or failed key promptly with the correct OEM-specification part, such as the Multiquip EM215, restores full drive engagement and prevents further damage to surrounding components.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.