The Husqvarna 542199045 Key 1/4 Square x 2.5" Long Round Both Ends is a genuine OEM component designed for Husqvarna floor saws and early entry saws, including the FS4800D, FS5000D, FS6600D, FS6800D, FS7000D, FS7000DL, FS8400D, FS5000, SoffCut5000, and RS8500D. As a direct OEM replacement, this key is manufactured to Husqvarna's exact dimensional specifications, ensuring a proper fit within the drivetrain assembly of your machine. DHS Equipment supplies this part to help keep your equipment performing at its best. Cross-reference part number 542199045 against your machine's parts diagram to confirm the correct application before ordering.
Key Features
- Exact OEM Dimensions — Manufactured to Husqvarna's precise 1/4-square profile and 2.5" length specification, ensuring correct torque transfer between mating shaft and hub components.
- Round Both Ends Profile — The rounded-end geometry on both sides allows the key to seat cleanly in the keyway without sharp-corner interference, supporting smooth installation and removal during service.
- Broad Floor Saw and Early Entry Saw Compatibility — Fits a wide range of Husqvarna floor saws — including the FS4800D, FS5000D, FS6600D, FS7000D, and FS8400D — as well as the SoffCut5000 early entry saw and RS8500D.
- Drivetrain Integrity — A correctly fitted key locks the blade shaft or drive component in rotational alignment; a worn or missing key causes slippage, vibration, and accelerated wear on the shaft and hub bore.
- Genuine Husqvarna OEM Part — Sourced directly from Husqvarna's construction equipment parts program, this component meets the same material hardness and dimensional tolerances as the original production part.
A drive key is a small but critical powertrain component that sits in a machined slot — called a keyway — between a rotating shaft and a hub, pulley, or blade adapter. It prevents the two mating parts from rotating independently of each other, transferring engine or motor torque directly and consistently. When a key shears, deforms, or works loose, the driven component can slip or spin freely on the shaft, causing loss of cutting power, erratic blade behavior, and potential damage to the shaft and hub surfaces. Replacing a worn or damaged key promptly with the correct OEM part restores the mechanical connection and protects the surrounding drivetrain components from further wear.
Part Details
| Part Number | 542199045 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Key 1/4 Square x 2.5" Long Round Both Ends |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Saw | FS4800D |
| Floor Saw | FS5000D |
| Floor Saw | FS6600D |
| Floor Saw | FS6800D |
| Floor Saw | FS7000D |
| Floor Saw | FS7000DL |
| Floor Saw | FS8400D |
| Floor Saw | FS5000 |
| Early Entry Saw | SoffCut5000 |
| Floor Saw | RS8500D |
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.
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