The Husqvarna 539912757 Key is a genuine OEM replacement designed for FS413, FS513, FS520, and FS524 floor saws. As a direct Husqvarna OEM component, this key is manufactured to the exact dimensions required for proper engagement and load transfer between mating shaft and hub assemblies on these machines. Cross-reference part number 539912757 against your parts diagram to confirm fitment before ordering. DHS Equipment supplies this part to help keep your floor saw operating at full capacity.
Key Features
- OEM-Exact Dimensional Tolerancing — manufactured to Husqvarna's precise specifications, ensuring correct interference fit within the keyway and full torque transfer without slippage or play.
- Drop-In Shaft Replacement — engineered to seat directly into the existing keyway groove with no modification to the shaft, hub, or housing required.
- Confirmed Fitment for FS Series Floor Saws — compatible with FS413, FS513, FS520, and FS524 floor saws; verify against your machine's parts diagram using part number 539912757.
- Restores Full Power Transfer — a worn or sheared key causes drive components to slip or spin freely on the shaft; installing a correctly fitted key restores solid mechanical engagement and reliable blade drive.
- Genuine Husqvarna OEM Quality — sourced directly through authorized Husqvarna channels, so material grade and hardness match the original specification for the demanding loads of concrete and asphalt cutting operations.
A key is a small but mechanically critical component that locks a rotating shaft to a hub, pulley, or gear, ensuring both turn together as a single unit under load. In a floor saw, the key transmits the full driving torque from the engine or drive shaft to the blade assembly or drive components — if it shears or wears, that connection is lost and the driven component spins freely, halting effective cutting. Replacing a damaged key promptly with the correct OEM part restores the mechanical bond and prevents secondary damage to keyway surfaces on the shaft or hub.
Part Details
| Part Number | 539912757 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Key |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Saw | FS413 |
| Floor Saw | FS513 |
| Floor Saw | FS520 |
| Floor Saw | FS524 |
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.
