The Wacker Neuson Key 4.78Mm is a genuine OEM component designed for the BV50A-P and BV50A-H series backpack vibrators. As a direct factory part, it is manufactured to the exact dimensional tolerances required for proper shaft and drive engagement within these machines. This key services multiple BV50A-P configurations — including SPM4+PH45 and SPM2+PH45 variants — as well as the BV50A-H backpack vibrator, making it a versatile stock item for contractors running Wacker Neuson backpack vibrator equipment. Sourcing the correct OEM key ensures the drivetrain connection performs as intended and avoids the wear and slippage that an incorrectly sized key can cause.
Key Features
- Exact 4.78Mm Dimensional Spec — Manufactured to the precise width tolerance required for correct keyway seating, preventing play or looseness in the drive connection.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, ensuring material grade and dimensional accuracy match the original production component.
- Direct Drop-In Replacement — Fits the existing keyway slot without modification, making installation straightforward during routine drivetrain servicing.
- Broad BV50A Series Coverage — Compatible with BV50A-P (SPM4+PH45 and SPM2+PH45 configurations) and BV50A-H backpack vibrators across multiple build variants.
- Drivetrain Integrity — A correctly fitted key locks the shaft and mating component together under load; a worn or undersized key allows rotational slip that accelerates damage to both shaft and hub.
A key is a small precision component seated in a machined slot — called a keyway — between a rotating shaft and a mating part such as a gear, pulley, or coupling. Its role is to transmit torque by locking the two parts together so they rotate as a single unit. In a backpack concrete vibrator like the BV50A series, this connection is essential for transferring power smoothly from the drive assembly to the vibrating head. When a key wears, deforms, or is incorrectly sized, the shaft and mating component can slip relative to each other, causing vibration loss, accelerated wear on both parts, and potential drive failure during use.
Part Details
| Part Number | 5000217271 |
|---|---|
| Old Part Number | 0217271 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Key 4.78Mm |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Backpack Vibrator | BV50A-P | 5000620399, 5000620764, 5000620767 |
| Backpack Vibrator | BV50A-P EU | 5000620892 |
| BV50A-H Backpack Vibrator | BV50A-H | 5200016908, 5100041314 |
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.
