The Wacker Neuson 5100005712 Flex Shafts SM 7S is a genuine OEM flexible shaft assembly designed for the M2500 and M1500 series internal concrete vibrators. As a direct factory replacement, this part is manufactured to the same specifications as the original, ensuring a proper, tool-free connection between the drive motor and the vibrator head. Verified fitment spans multiple voltage and regional variants across the M2500 and M1500 families, including 120V US, 230V EU, and 120V/230V GB configurations.
Key Features
- Genuine OEM Shaft Integrity — Engineered to transmit rotational force without flex fatigue, maintaining consistent vibration output from drive unit to head.
- Direct Drop-In Replacement — Designed to connect to M2500 and M1500 series drive motors and vibrator heads using the existing SM 7S interface, requiring no adaptation.
- Broad Model Coverage — Compatible with M2500/120 US, M2500/230 EU, M2500/120 GB, M1500/120 US, M1500/120 GB, and M1500/230 EU configurations.
- Sustained Vibration Delivery — A correctly functioning flex shaft transfers full motor output to the vibrator head; a worn or kinked shaft results in reduced consolidation energy and uneven concrete consolidation.
- Electrical Safety Compliance — As a rotating drive component in an electrical vibrator system, using a correctly rated OEM shaft maintains the integrity of the drive assembly and reduces the risk of unexpected failure under load.
The flex shaft in an internal concrete vibrator serves as the mechanical link between the electric drive motor and the vibrator head. It transmits the rotational energy that generates the high-frequency vibrations needed to consolidate fresh concrete, driving out air pockets and ensuring a dense, uniform pour. When a flex shaft wears, kinks, or breaks, vibration output drops sharply or stops entirely, compromising concrete quality and halting the pour — making prompt replacement critical to keeping work on schedule.
Part Details
| Part Number | 5100005712 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flex Shafts SM 7S |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| M2500/120 | M2500/120 US | 5100006000 |
| Drive Engine | M2500/230 EU W | 5100047311 |
| M1500/230 | M1500/230 EU | 5100005142 |
| M2500/120 | M2500/120 GB | 5100010890 |
| M1500/120 | M1500/120 US | 5100004500 |
| M1500/120 GB | M1500/120 GB | 5100005145 |
| M2500/230 | M2500/230 EU | 5100009717 |
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.
