The Multiquip 50017800 Woodruff Key 4 x 6.5 is a genuine OEM component designed for MVH502DSB and MVH502DSB2 reversible plate compactors, the MQ41TDH trash pump, and the MDR-9D ride-on power trowel. As a direct Multiquip OEM part, the part is manufactured to the same specification as the original, ensuring a drop-in fit with no guesswork. Verify your model code against the fitment list before ordering to confirm compatibility with your specific unit. Sourced directly through authorized Multiquip distribution, this key is backed by genuine OEM quality assurance.
Key Features
- Genuine OEM Precision: — Manufactured to exact Multiquip tolerances, ensuring the correct interference fit between shaft and hub without rocking or slippage.
- Cross-Equipment Compatibility: — Fits MVH502DSB, MVH502DSB2, MQ41TDH, and MDR-9D — a single OEM key spec shared across multiple Multiquip machine families.
- Direct Drop-In Installation: — Matches the original keyway dimensions precisely, seating flush into the milled slot on both shaft and mating component without filing or adjustment.
- Drivetrain Torque Integrity: — A correctly seated Woodruff key locks rotational alignment between shaft and driven component; a worn or sheared key causes slippage, lost drive, and accelerated shaft damage.
- Durable Construction: — Formed from hardened steel stock rated for the shear loads and vibration cycles common to compaction, pumping, and troweling applications.
A Woodruff key is a small, crescent-shaped steel component that seats into a milled slot on a shaft and a corresponding keyway in a mating hub, sprocket, or pulley. Its function is to lock the two parts rotationally together so that torque transfers cleanly from the shaft to the driven component without slipping. When a Woodruff key shears or works loose — typically due to impact overload, excessive vibration, or wear over time — the driven component spins freely on the shaft, causing an immediate loss of drive and potential damage to the shaft itself. Replacing a worn or failed key promptly with the correct OEM part restores full power transfer and protects the surrounding drivetrain components from further wear.
Part Details
| Part Number | 50017800 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Woodruff Key 4 x 6.5 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Plate Compactors | MVH502DSB |
| Plate Compactors | MVH502DSB2 |
| MQ Trash Pumps | MQ41TDH |
| Power Trowels | MDR-9D |
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.
