Multiquip 0310 Key 1/4 Square 1-1/2

The Multiquip 0310 is a genuine OEM Key 1/4 Square 1-1/2 designed for a wide range of Multiquip equipment including EM120P Series and EM120S Series Essick mixers, WM120PH and WM120SH Whiteman mixers, MT85 rammers, JTNS20, JTNSW20, JTNSW20HTCSL, and JTNSW24HTCSL international ride-on power trowels, the JTO-SERIES Whiteman ride-on trowels, and HDA-SERIES and B Series China walk-behind power trowels. As a genuine OEM component sourced directly from Multiquip, this key is manufactured to the exact dimensions required for proper shaft and hub engagement across all compatible models. Sourcing the correct key is critical — an undersized or worn key allows shaft slippage that leads to drivetrain damage and unexpected downtime. Verify your model code against the fitment list above before ordering to ensure a direct match.

Key Features

• Genuine OEM Dimensional Accuracy — Manufactured to the exact 1/4-inch square cross-section and 1-1/2-inch length specified by Multiquip, ensuring correct engagement between shaft and hub with no play or rocking.
• Drop-In Shaft Keyway Fitment — Machined to slide cleanly into the keyway slot without filing or grinding, making installation straightforward on all listed compatible models.
• Broad Cross-Equipment Compatibility — A single OEM part number covering Essick and Whiteman mixer series (EM120P, EM120S, WM120PH, WM120SH), MT85 rammers, and multiple international and domestic trowel series including JTNS20, JTNSW20HTCSL, JTO-SERIES, and HDA-SERIES.
• Torque Transmission Integrity — A properly fitted square key locks rotational load transfer between the shaft and driven component, preventing the slippage that causes keyway wear, shaft scoring, and hub damage.
• Cost-Effective Preventive Replacement — Keys are a low-cost consumable that should be inspected and replaced during any drivetrain service interval; replacing a worn key before failure protects far more expensive shafts and hubs.

A square key is a small but mechanically critical component that sits in a machined slot — the keyway — cut into both a rotating shaft and its mating hub or gear. Its job is to lock the two together so that rotational force is transferred from the shaft to the driven component without slipping. When a key wears, deforms, or shears, the shaft and hub lose positive engagement, causing the driven component to spin freely or intermittently — resulting in loss of function and rapid damage to the keyway surfaces of both parts. Replacing a worn or damaged key with the correct OEM-specification part restores full torque transfer and prevents the escalating damage that comes from continued operation with a compromised connection.

For fitment questions or help confirming compatibility with your specific machine, contact the DHS Equipment parts team.

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.