Multiquip 12940 Keyset

The Multiquip 12940 Keyset is a genuine OEM component designed for Whiteman hydrostatic ride-on power trowel models HTXD6i, STXD6i, STX55Y6, STX55J6, HTX44K5, and HTX44K4. Sourced directly from Multiquip, this keyset delivers the exact fit and specification required to maintain proper shaft-to-component engagement on these machines. Verified fitment across both the HTX and STX series means you can order with confidence and get your trowel back to work without guesswork.

Key Features

• Genuine OEM Specification — Manufactured to Multiquip's exact tolerances, ensuring proper keyway engagement and torque transfer without slippage or premature wear.
• Drop-In Installation — Matches the original keyset profile exactly, fitting directly into the existing keyway without recutting or modification to the shaft or hub.
• Broad HTX and STX Series Fitment — Confirmed for HTXD6i, STXD6i, STX55Y6, STX55J6, HTX44K5, and HTX44K4 hydrostatic ride-on trowels.
• Maintains Positive Drive Connection — A correctly seated keyset locks rotating components to the shaft, preserving blade speed consistency and trowel control across the full operating range.
• Wear-Replacement Part — Keysets are subject to shear and fretting under load cycles; replacing a worn or damaged key promptly prevents progressive damage to the shaft and hub bore.

A keyset secures a rotating component — such as a sprocket, pulley, or drive hub — to a shaft by filling the keyway slot machined into both parts. This mechanical lock prevents the component from spinning independently of the shaft, ensuring that drive force is transmitted cleanly and consistently. When a key wears, shears, or works loose, the driven component slips on the shaft, causing loss of blade control, vibration, and rapid damage to both the shaft and the hub bore that can turn a low-cost repair into a major rebuild.

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.