The Wacker Neuson Flex Shafts SM 4S is a genuine OEM flexible shaft assembly designed for M1500 and M2500 series internal concrete vibrators. Sourced directly from Wacker Neuson, this part meets the same specifications as the original component installed at the factory. Verified fitment covers both the M1500 and M2500 series across 120V US, 230V EU, and 120V GB configurations, including the M2500/230 EU W drive engine variant.
Key Features
- Genuine OEM Torque Transmission: — Built to the exact torsional and dimensional specifications required to deliver consistent rotational force from the drive unit to the vibrator head.
- Direct Drop-In Replacement: — Engineered to connect to the same drive couplings and vibrator heads as the original shaft, allowing a straightforward swap without custom fitting.
- Broad Series Compatibility: — Fits M1500 and M2500 series internal concrete vibrators across 120V US, 230V EU, and 120V GB variants, including the M2500/230 EU W drive engine configuration.
- Sustained Vibrator Head Performance: — A worn or damaged flex shaft reduces vibration amplitude at the head, leading to poorly consolidated concrete; replacing it restores full consolidation output.
- OEM Part Assurance: — Carries the Wacker Neuson part number 5100005710 for straightforward verification against your machine's parts manual before you order.
The flex shaft on an internal concrete vibrator is the flexible drive link between the motor or drive unit and the vibrator head. It transmits rotational energy down through the shaft housing, spinning the eccentric weight inside the head that generates the vibration needed to consolidate fresh concrete. When a flex shaft wears, kinks, or breaks, the vibrator head loses power or stops working entirely, which can result in voids, honeycombing, and compromised structural integrity in the finished pour. Replacing a faulty flex shaft promptly keeps the vibrator operating at the output level the machine was designed to deliver.
Part Details
| Part Number | 5100005710 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flex Shafts SM 4S |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| M1500/120 | M1500/120 US | 5100004500 |
| M1500/230 | M1500/230 EU | 5100005142 |
| M1500/120 GB | M1500/120 GB | 5100005145 |
| M2500/120 | M2500/120 US | 5100006000 |
| M2500/230 | M2500/230 EU | 5100009717 |
| M2500/120 | M2500/120 GB | 5100010890 |
| Drive Engine | M2500/230 EU W | 5100047311 |
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.
