Wacker Neuson 5000018803 Key A8 X 7 X 50

The Wacker Neuson Key A8 X 7 X 50 is a genuine OEM component designed for the CT30, CT36, and CT48 series walk-behind concrete power trowels. This keyed drive component is sourced directly from Wacker Neuson, ensuring it meets the exact dimensional and material specifications of the original part. As a genuine OEM part, delivers a direct, drop-in fit across a wide range of CT-series trowel configurations — including gas, diesel, and electric variants in both standard and CE-compliant builds. Confirm your model number against the fitment list before ordering to ensure correct application.

Key Features

• Genuine OEM Dimensional Accuracy — Manufactured to Wacker Neuson's exact A8 x 7 x 50 profile, ensuring the key seats correctly in the keyway without play or binding.
• Direct Drop-In Replacement — Matches the original key slot geometry on CT-series trowel drive shafts, allowing straightforward installation without machining or modification.
• Broad CT-Series Fitment — Compatible with CT30, CT36, and CT48 walk-behind trowels across gas, diesel, and electric power configurations, including CE-compliant variants.
• Torque Transmission Integrity — A correctly fitted drive key locks the rotating assembly to the shaft, ensuring full and consistent torque transfer to the trowel blades during finishing operations.
• Prevents Shaft and Hub Damage — Using a correctly sized OEM key avoids the fretting, keyway wear, and hub damage that result from undersized or worn keys under load.

A drive key is a small but critical component that locks a rotating part — such as a gear, pulley, or blade spider hub — to its shaft, preventing relative rotation between the two under torque. On a walk-behind concrete trowel like the CT30, CT36, and CT48 series, the key transmits engine or motor power through the drivetrain to the finishing blades. When a key shears, deforms, or wears loose in its keyway, the driven component slips on the shaft, causing erratic blade speed, vibration, or complete loss of drive. Replacing a failed or damaged key promptly with the correct OEM-spec part restores full power transmission and protects the shaft and hub from progressive keyway damage.

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.