The Wacker Neuson 5100005705 Flex Shafts SM 4E is a genuine OEM component designed for the M1500 and M2500 series internal concrete vibrators. As a direct OEM replacement, the 5100005705 is manufactured to the same specifications as the original part, ensuring proper torque transmission between the drive motor and the vibrator head. Verified fitment spans multiple M1500 and M2500 configurations, including US 120V, EU 230V, and GB 120V variants across both model families.
Key Features
- Genuine OEM Construction: — Engineered to the same torsional flex and diameter tolerances as the original shaft, maintaining consistent power delivery to the vibrator head.
- Drop-In Compatibility: — Connects directly to the drive unit and vibrator head using the same coupling interface as the factory shaft, requiring no adaptation.
- Broad M-Series Fitment: — Confirmed for M1500/120 US, M1500/120 GB, M1500/230 EU, M2500/120 US, M2500/120 GB, M2500/230 EU, and M2500/230 EU W configurations.
- Sustained Vibration Output: — A properly functioning flex shaft transfers full rotational energy to the vibrator head; a worn or kinked shaft reduces vibration amplitude and leads to poor concrete consolidation.
- Multi-Voltage Coverage: — Part 5100005705 covers both 120V North American and GB models as well as 230V European-spec machines within the SM 4E shaft specification.
The flex shaft on an internal concrete vibrator is the flexible drive link that connects the electric motor in the drive unit to the vibrator head inserted into the concrete. It transmits rotational force through a protective outer casing, allowing the operator to maneuver the head freely while the motor remains stationary. When a flex shaft wears, kinks, or breaks, the vibrator head loses spin speed or stops entirely, preventing proper consolidation of the concrete and potentially leaving air voids in the pour.
Part Details
| Part Number | 5100005705 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flex Shafts SM 4E |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| M1500/120 | M1500/120 US | 5100004500 |
| Drive Engine | M2500/230 EU W | 5100047311 |
| M2500/230 | M2500/230 EU | 5100009717 |
| M2500/120 | M2500/120 US | 5100006000 |
| M1500/230 | M1500/230 EU | 5100005142 |
| M2500/120 | M2500/120 GB | 5100010890 |
| M1500/120 GB | M1500/120 GB | 5100005145 |
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.
