Multiquip 50010500 Fitting Key 4X4X12 2G40

The Multiquip 50010500 Fitting Key 4X4X12 2G40 is a genuine OEM component designed for RAMMAX walk-behind roller models including the RW1404, RW1404MR, and RW1504HF. As a direct OEM replacement sourced through Multiquip's authorized parts program, 50010500 delivers the exact dimensional tolerances required for correct installation and secure shaft-to-hub engagement. Verify your serial number against the listed fitment ranges to confirm compatibility before ordering — particularly for RW1404MR units from S/N 326075 and up, and RW1504HF units up to S/N.

Key Features

• Genuine OEM Tolerancing — Manufactured to Multiquip's exact 4x4x12mm key specification, ensuring the correct interference fit between shaft and mating component with no guesswork on sizing.
• Drop-In Installation — Matches the original keyway geometry on covered RAMMAX roller models, allowing direct installation into the existing slot without modification to the shaft or hub.
• Confirmed Fitment for RAMMAX Roller Models — Verified for RW1404, RW1404MR (S/N 326075 and up), and RW1504HF (up to S/N 1534188); always cross-reference your serial number before ordering.
• Torque Transfer Integrity — A correctly seated key prevents rotational slippage between the shaft and driven component, maintaining consistent drum or drive output during compaction passes.
• Genuine OEM Part — Sold as an authorized Multiquip OEM replacement, ensuring the part meets the same material and dimensional standards as the original production component.

A fitting key — sometimes called a woodruff key or parallel key depending on its profile — is a small but load-bearing component that locks a rotating shaft to a hub, gear, sprocket, or pulley. It sits in a machined slot called a keyway and prevents the two mating parts from spinning independently under torque. On a walk-behind vibratory roller like the RAMMAX RW series, proper key engagement is essential to transmitting power cleanly from the drive system to the drum or auxiliary components. When a key wears, shears, or goes missing entirely, the driven component will slip or fail to rotate, resulting in loss of compaction force and potential damage to the shaft or hub surfaces.

For fitment questions or parts support, contact DHS Equipment directly — our team can help confirm compatibility for your specific RAMMAX roller serial number.

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.