The Husqvarna 505576503 Rotor Assembly DM220/230 120V is a genuine OEM component designed for the DM220 and DM230 concrete core drills. This rotor assembly is built to Husqvarna's exact electrical and dimensional specifications, ensuring the motor delivers consistent, full-rated power output for demanding core drilling applications. DHS Equipment supplies this part to help keep your core drill running at full performance. Cross-reference part number 505576503 against your parts diagram to confirm fit before ordering.
Key Features
- OEM-Spec Winding Construction — Genuine Husqvarna rotor wound to the correct resistance and insulation class for 120V operation, maintaining rated motor output and thermal stability.
- Direct Drop-In Replacement — Machined to match original shaft dimensions and armature geometry, this rotor assembly seats correctly into the DM220 and DM230 motor housings without modification.
- Confirmed Fitment for DM220 and DM230 Core Drills — Engineered specifically for both the DM220 and DM230 concrete core drill motors; always verify against your parts diagram using part number 505576503.
- Restored Drilling Power — A worn or shorted rotor causes motor overheating, loss of torque, and inconsistent core drill speed; replacing it with this OEM assembly restores full rotational force and stable motor performance.
- Electrical Safety Compliance — Genuine OEM construction ensures the rotor meets the original insulation and grounding specifications, reducing the risk of electrical faults in a 120V tool environment.
The rotor is the rotating electromagnetic component at the heart of the drill motor. It works in concert with the stator to convert electrical energy into the rotational force that drives the core bit through concrete, masonry, and other hard materials. When a rotor wears or develops a winding fault, the motor loses torque, draws excessive current, runs hot, or fails to start entirely — all of which bring core drilling operations to a halt. Replacing a failed rotor with the correct OEM assembly restores the motor's designed power delivery and protects the surrounding motor components from the heat and stress caused by a compromised winding.
Part Details
| Part Number | 505576503 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Rotor Assembly DM220/230 120V |
Compatibility & Fitment
| Name | Model |
|---|---|
| Concrete Core Drill | DM230 |
| Concrete Core Drill | DM220 |
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.
