The Wacker Neuson 5100005709 Flex Shafts SM 3S is a genuine OEM flexible shaft assembly designed for the M1500 and M2500 series internal concrete vibrators. As a direct factory replacement, this part is manufactured to the same specifications as the original, ensuring correct coupling and transmission of motor power through the shaft housing to the vibrator head. Fitment covers a wide range of M1500 and M2500 configurations, including 120V US, 230V EU, and GB variants. Keeping a verified OEM shaft on hand is the most reliable way to maintain consistent vibrator output on the pour.
Key Features
- Genuine OEM Transmission Integrity — Manufactured to Wacker Neuson's original torque and flex specifications, ensuring the shaft delivers consistent rotational energy without slippage or harmonic loss.
- Direct-Fit Replacement — Engineered to connect directly to the M1500 and M2500 motor drive and vibrator head without modification to the shaft housing or end fittings.
- Broad M-Series Compatibility — Confirmed fitment across M1500/120 US, M1500/230 EU, M1500/120 GB, M2500/120 US, M2500/120 GB, M2500/230 EU, and M2500/230 EU W drive engine configurations.
- Sustained Vibration Output — A worn or damaged flex shaft causes erratic vibrator frequency, incomplete concrete consolidation, and voids in the pour; a sound OEM shaft restores full, steady vibration amplitude.
- OEM Part Number Accuracy — Sourced directly under Wacker Neuson part number 5100005709, eliminating fitment guesswork across the multiple voltage and regional variants in the M-series lineup.
A flex shaft transfers rotational power from the vibrator's drive motor to the immersion head through a flexible, armored housing. This design allows the operator to maneuver the head freely within the concrete form while the motor remains stationary. Over time, the inner cable can fatigue, kink, or fray, which causes the vibrator head to spin unevenly or stop rotating altogether — resulting in poorly consolidated concrete with air pockets and reduced structural strength. Replacing a worn flex shaft with a genuine OEM unit restores full power transfer and consistent vibration depth.
Part Details
| Part Number | 5100005709 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flex Shafts SM 3S |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| M1500/120 | M1500/120 US | 5100004500 |
| M1500/230 | M1500/230 EU | 5100005142 |
| M2500/120 | M2500/120 US | 5100006000 |
| M1500/120 GB | M1500/120 GB | 5100005145 |
| Drive Engine | M2500/230 EU W | 5100047311 |
| M2500/120 | M2500/120 GB | 5100010890 |
| 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.
