The Multiquip 50027 is a genuine OEM Square Key 1/4" x 40mm designed for Multiquip concrete mixers and RAMMAX rollers, including MC94P/S, MC64P/S, PRO20, RW1404, RW1404MR, RW1504HF, and RW1810 series equipment. As a direct OEM replacement sourced from Multiquip, this key meets the original design tolerances required for dependable power transmission in your machine. Confirm your model code against the fitment list before ordering to ensure an accurate match. DHS Equipment stocks genuine Multiquip parts so you can get the right component without the guesswork.
Key Features
- Genuine OEM Tolerancing — Manufactured to Multiquip's original dimensional specifications, ensuring the key seats correctly in both the shaft keyway and the mating hub without excessive play or binding.
- Direct Drop-In Replacement — Matches the original 1/4" square profile and 40mm length, installing the same way as the factory part with no machining or rework needed.
- Broad Fitment Coverage — Compatible with MC94P/S, MC94SK/MC94PK, MC64P/S, MC64SK/MC64PK, PRO20, RW1404, RW1404MR, RW1504HF (up to S/N 1534188), and RW1810 equipment.
- Positive Power Transfer — A correctly fitted square key locks rotating components — such as drum drives and roller shafts — to their shafts, transmitting full torque without slippage or wear-induced vibration.
- Prevents Costly Shaft and Hub Damage — A worn or missing key allows components to spin on the shaft, rapidly damaging keyways in both the shaft and hub; replacing it promptly protects far more expensive assemblies.
A square key is a small but critical power-transmission component that sits in matched keyways cut into a rotating shaft and its mating hub or gear, locking the two together so they turn as a single unit. Without it — or with a worn, sheared, or undersized key — the driven component can slip or rotate freely on the shaft, resulting in lost drive, uneven loads, and accelerating damage to the surrounding machined surfaces. On concrete mixers and rollers, a failed key typically presents as sudden loss of drum rotation or drive engagement, and prompt replacement with the correct OEM part restores full mechanical connection and protects the integrity of the shaft assembly.
Part Details
| Part Number | 50027 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Square Key 1/4" x 40mm |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Mixers | MC94P/S |
| Essick Mixers | PRO20 |
| MQ Mixers | MC64P/S |
| MQ Mixers | MC94SK/MC94PK |
| MQ Mixers | MC64SK/MC64PK |
| Rollers | RW1404MR |
| Rollers | RW1404 |
| Rollers | RW1504HF up to S/N 1534188 |
| Rollers | RW1404MR S/N 326075 and up |
| Rollers | RW1810 |
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.
