The Husqvarna 503266004 Coupler is a genuine OEM replacement designed for a wide range of Husqvarna K-series power cutters and DM-series concrete core drills. This coupler delivers an exact mechanical fit across compatible models including the K770, K970, K750, K760, K1PACE, DM340, DM280, DM700, and DMS240, among others. As a genuine Husqvarna part, it is manufactured to the same tolerances and material specifications as the original component. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Tolerancing — Manufactured to Husqvarna's original mechanical specifications, ensuring the mating surfaces, engagement geometry, and material grade match the part it replaces.
- Drop-In Replacement — Installs directly into the original coupler position with no modification to the host machine, maintaining correct alignment and drive engagement from the first use.
- Broad Model Compatibility — Fits an extensive range of K-series power cutters (including K650, K750, K760, K770, K960, K970, K1PACE, and K1270) and DM/DMS-series concrete core drills (including DM280, DM340, DM700, and DMS240).
- Restored Drive Transmission — A functioning coupler maintains positive torque transfer between the drive shaft and the working attachment; a worn or damaged coupler causes slippage, vibration, and loss of cutting or drilling power.
- Cross-Reference Confidence — Verify part number 503266004 against your machine's parts diagram to confirm fitment before ordering, especially across the many compatible model variants in this range.
The coupler is a critical mechanical link that transfers rotational drive force from the machine's motor shaft to the cutting blade spindle or drill attachment. When this component is intact and properly seated, power is delivered smoothly and consistently to the working tool. If the coupler becomes worn, cracked, or damaged, drive engagement breaks down — resulting in erratic performance, vibration, or a complete loss of power to the cutting or drilling attachment, which requires the coupler to be replaced before the machine can return to productive use.
Part Details
| Part Number | 503266004 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Coupler |
Compatibility & Fitment
| Name | Model |
|---|---|
| Concrete Core Drill | DM700 |
| Power Cutter | K7000 |
| Concrete Core Drill | DM280 |
| Concrete Core Drill | DMS240 |
| Concrete Core Drill | DM340 |
| Power Cutter | K2500 |
| Power Cutter | K40 |
| Power Cutter | K760II |
| Power Cutter | K760 |
| Power Cutter | K770 |
| Power Cutter | K970 |
| Power Cutter | K1PACE |
| Power Cutter | K1270 |
| Power Cutter | K3000 |
| Power Cutter | K4000 |
| Concrete Core Drill | DMS280 |
| Power Cutter | K650 |
| Power Cutter | K750 |
| Power Cutter | K1250 |
| Power Cutter | K960 |
| Concrete Core Drill | DM200 |
| Concrete Core Drill | DM230 |
| Concrete Core Drill | DM650 |
| Power Cutter | K1260 |
| Concrete Core Drill | DM540i |
| Concrete Core Drill | DM540iKIT |
| Power Cutter | K3600 |
| Power Cutter | K540i |
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.
