The Husqvarna 502446604 Parallel Key is a genuine OEM component designed for the DMS280 concrete core drill system. This small but critical drive component ensures the correct rotational connection between mating shaft and hub, maintaining proper torque transfer during core drilling operations. DHS Equipment supplies this part to help keep your DMS280 running at full capability with the correct OEM specification component.
Key Features
- Genuine OEM Specification — Manufactured to Husqvarna's exact dimensional tolerances, ensuring the key seats fully and transmits torque without slop or stress concentration in the keyway.
- Direct Drop-In Replacement — Machined to the precise profile of the DMS280 keyway, this parallel key installs directly into the existing slot without modification to shaft or hub.
- Purpose-Built for the DMS280 — Engineered specifically for the DMS280 concrete core drill, cross-reference part number 502446604 against your parts diagram to confirm fitment before ordering.
- Restored Drive Integrity — A correctly fitted parallel key locks the drive components in positive engagement, preventing slippage that would otherwise cause uneven core wear, loss of feed rate, and accelerated damage to the drive assembly.
- Durable Material Grade — Built from hardened steel to withstand the continuous torsional load of core drilling through concrete, resisting the shear forces that cause premature wear or key failure.
A parallel key is a precision-machined steel insert that sits in matching slots cut into a shaft and a hub or gear, creating a positive mechanical lock between the two rotating components. It transmits torque from the drive shaft to the driven component, preventing the hub from rotating independently on the shaft. When a parallel key wears, shears, or goes missing, the drive connection is lost — the shaft spins freely inside the hub, making the machine unable to deliver rotational force to the drill head. Replacing a worn or damaged key promptly with the correct OEM part restores full drive engagement and protects surrounding shaft and hub surfaces from the fretting damage that loose-fit operation causes.
Part Details
| Part Number | 502446604 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Parallel Key |
Compatibility & Fitment
| Name | Model |
|---|---|
| Concrete Core Drill | DMS280 |
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.
