The Multiquip 12101 is a genuine OEM Key 5/16 Sq x 2-5/8 Hardened designed for a wide range of Multiquip concrete vibrators and walk-behind power trowels. This hardened steel key is a direct-fit replacement for vibrator head models including VH52, VH42, VH32, VHW72, VHW62, VHB52, VHB42, and VHB32, as well as frequency vibrator models FX30E6, FX60E6, FX50G6, and FX40G6, and Whiteman ride-on power trowel models HTN28K and HTN27K. Sourced directly from Multiquip, part 12101 meets the same material and dimensional standards as the original component it replaces. Keeping this small but critical component in good condition ensures proper shaft-to-hub torque transfer and helps prevent costly drivetrain damage.
Key Features
- Hardened Steel Construction — Manufactured to OEM hardness specifications, ensuring the key withstands the shear forces and rotational loads common in vibrator and trowel drivetrain applications.
- Exact Dimensional Fit — Cut to 5/16 square by 2-5/8 length to drop into the keyway without shimming, filing, or adjustment.
- Broad Fitment Coverage — Compatible with VH, VHW, VHB, and FX series concrete vibrators, plus HTN28K and HTN27K Whiteman ride-on trowels — a single part number serving multiple machines.
- Torque Transfer Integrity — A correctly fitted hardened key locks the shaft and hub in alignment, delivering full rotational force to the vibrator head or trowel blade assembly without slippage.
- Genuine OEM Part — Supplied by Multiquip as part number 12101, so you get the same component installed at the factory — no guesswork on material grade or tolerancing.
A shaft key is a small rectangular piece of hardened steel that sits in a machined slot — called a keyway — between a rotating shaft and a hub or gear. Its job is to lock those two components together so they rotate as one unit, transmitting torque without slipping. In concrete vibrators, the key connects the motor shaft to the eccentric or flex-shaft coupling; in power trowels, it secures drive components within the gearbox or blade hub assembly. When a key wears, shears, or works loose, the shaft spins independently of the hub, resulting in loss of drive, vibration output failure, or accelerated damage to the surrounding components — making prompt replacement with a correctly hardened part essential.
Part Details
| Part Number | 12101 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key 5/16 Sq x 2-5/8 Hardened |
Compatibility & Fitment
| Name | Model |
|---|---|
| Vibrators | VH52 |
| Vibrators | VH42 |
| Vibrators | VH32 |
| Vibrators | VHW72 |
| Vibrators | VHW62 |
| Vibrators | VHB52 |
| Vibrators | VHB42 |
| Vibrators | VHB32 |
| Vibrators | FX30E6 |
| Vibrators | FX60E6 |
| Vibrators | FX50G6 |
| Vibrators | FX40G6 |
| Whiteman Ride-On Power Trowels | HTN28K |
| Whiteman Ride-On Power Trowels | HTN27K |
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.
