Key Features
Carbide Edge The durable carbide blade holds up to regular planing work and stays useful longer than a basic steel edge in common wood applications. Cleaner Spiral Cut This Festool planer knife uses a spiral arrangement that creates a pulling cut, which helps improve surface finish during planing, chamfering, and fitting work. Fast Blade Swap Blade changes are handled with three screws, and the fit is designed so you do not need to reset blade protrusion after installation.
Overview
The Festool Spiral Knife HW 82 SD HLC 82 is a replacement planer blade for the planer head, model number 577999. This is a planer knife designed for planing solid wood and other wood materials. If you use your planer for fitting doors, cleaning up rebates, trimming wallboards, or breaking edges on beams and trim, this is the wear part that keeps the cut quality where it should be.
What matters here is not just that it is a replacement blade, but how it cuts. Festool uses a spiral blade arrangement that creates a pulling cut. In real use, that means a smoother planing action and better finish quality on common planing tasks. For adjustment work on doors, infill panels, cornices, and similar finish pieces, that cleaner cut saves time on cleanup and sanding.
The blade itself is carbide, which is the right material for an accessory like this because durability is the whole point. A planer blade takes a beating, especially if you are doing repeated passes in hardwood, jobsite softwood, or engineered wood materials. The carbide construction helps the edge stay serviceable longer under normal planing use.
Festool also got the installation side right. The blade is changed with just three screws, and the fit is designed so the blade seats correctly without needing to adjust blade protrusion. That matters because it cuts down setup time and takes some of the guesswork out of maintenance. When a replacement part goes in cleanly and runs true, you spend less time tuning and more time working.
At 82 mm wide, this planer knife is sized for standard planing tasks in the matching head setup. It is also very light at 0.03 kg, so it is clearly a compact replacement component rather than a bulky accessory kit. The emphasis is on accurate fit, smooth running, and dependable cutting performance rather than added complexity.
Compatibility matters with accessories like this. The product data specifically notes that it is not suitable for HL 850, so buyers need to match the blade to the correct planer head before ordering. That is the kind of detail that prevents downtime and return headaches.
If you are a carpenter, finish contractor, remodeler, cabinet installer, or serious DIY user maintaining a Festool planer setup, this is the kind of replacement part worth buying correctly the first time. The Festool Spiral Knife HW 82 SD HLC 82 is for users who care about cut quality, proper fit, and quick serviceability, not just grabbing the cheapest blade that happens to be close in size.
Built for Clean Planing Results
This replacement blade is built for the part of planing work that actually matters: getting back to a smooth, controlled cut without fussing over setup.
- Spiral blade layout helps produce a pulling cut for higher planing quality
- Optimized fit means no blade protrusion adjustment is required after installation
- Designed for standard wood planing tasks including door fitting, rebates, and chamfering
What’s in the Box
- (1) Festool Spiral Knife HW 82 SD HLC 82
Key Specifications
| Blade Type | Spiral planer knife |
|---|---|
| Blade Length | 82 mm |
| Material | Carbide |
| Weight | 0.03 kg |
| Blade Change Method | Three-screw installation |
| Adjustment Required | No blade protrusion adjustment required |
Compatibility
Planer Head Fit Designed as a replacement blade for the planer head in the HLC 82 setup. Compatibility Note Not suitable for HL 850.
Built For
Carpentry Woodworking Remodeling Door Fitting Chamfering Beams Planing Rebates Trim Adjustments Wood Wallboard Fitting
Pro Tip
Before ordering a replacement blade, confirm the planer head setup and do not go by width alone. An 82 mm knife can still be the wrong part if your planer is an HL 850, and that is exactly the kind of mismatch that wastes time on the bench.
Tool Nut’s Take
Tool Nut’s Take
Festool Spiral Knife HW 82 SD HLC 82 Keeps the Cut Quality Where It Should Be
This is the right kind of replacement part: simple, durable, easy to install, and built to get your planer cutting clean again without extra tuning.
- Who it’s for: Woodworkers, finish carpenters, remodelers, and Festool users maintaining an HLC 82 planer head for regular fitting and surfacing work.
- Why it stands out: The carbide construction, spiral pulling cut, and no-fuss fit are the big wins here. Those are the details that affect finish quality and maintenance time.
- Worth knowing: This is not a universal planer knife. Check fit before you buy, because the product data clearly says it is not suitable for HL 850.
Common Questions
- What kind of product is this? It is a replacement spiral planer knife for the planer head.
- What materials is it intended to work on? The listed applications include planing solid wood and other wood materials.
- How wide is the blade? The blade length and cutting width are listed as 82 mm.
- Will it fit the Festool HL 850? No. The product data specifically states it is not suitable for HL 850.
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