The Festool TSC 55 KS Cordless Track Saw (577991) is a battery-powered plunge-cut circular saw designed for making straight, splinter-free cuts in sheet goods, plywood, and solid lumber up to 2-1/8-in. (55mm) thick, on or off the guide rail. This is a cordless track saw built for finish carpenters, cabinet installers, and remodelers who need table-saw-quality cuts without hauling a table saw — or a cord — to the cut. It replaces SKU 576717, and the headline change is the battery setup: where the previous generation ran on two 18V batteries, the TSC 55 KS runs on a single battery and still matches or exceeds that saw's cutting performance when paired with Festool's TBX 8 Tabless Battery.

Cutting depth ranges from 0 to 2-1/8-in. (0 to 55mm), and bevel adjustment runs from -1 to 47 degrees, covering everything from flush trims to compound bevel work. The included blade is a newly designed 1/16-in. (1.6mm) thin-kerf blade — thinner than a standard circular saw blade — which means the motor removes less material per pass. On a cordless saw, that translates directly into more cuts per charge and less strain pulling the saw through hardwood or thick sheet stock. A brushless EC-TEC motor and Festool's power electronics run the idle speed from 3,500 to 5,200 RPM depending on load, so the saw doesn't blindly spin at full speed through easy cuts and burn through the battery unnecessarily.

Two design details set this saw apart from a standard cordless circular saw. First, the motor housing is slimmer than the previous generation and stays within the width of the guide rail, so the saw doesn't catch on clamps or overhang the material edge as you push it through a cut — a small detail that matters when you're working close to a wall or a stack of material. Second, a dual-pointer depth-of-cut scale reads accurately whether the saw is running freehand or riding the guide rail, so there's no parallax error to account for and no need to re-zero the scale when switching between the two setups. The FastFix spindle lock also makes blade changes quick, and the saw's compact design lets it rest securely on its side for an easier blade swap.

KickbackStop is a sensor-based system on this saw that reacts almost instantly to help arrest the motor and blade if the saw binds or kicks back during a cut, then resets quickly so you're not stopped for long. A transparent sight window keeps the blade visible during the cut for better line-following, and the dust bag included in the box empties easily between cuts; swap it for a hose connection to a Festool dust extractor and the saw can trigger the extractor's Bluetooth auto-start the instant you pull the trigger, so the vacuum is already running before the blade touches the material. A retrofittable LED light is available separately to light up the cutline in dim conditions.

System compatibility runs through Festool's 18V battery platform and guide rail ecosystem. The saw is optimized for the TBX 8 Tabless Battery but also runs on the standard 5.0Ah Li-HighPower battery, and it works with Festool's FS guide rails in multiple lengths, along with splinterguards, worktables, and angle guides for repeatable setups. Blade changes use standard 160mm circular saw blades, so swapping in a blade suited for laminate, aluminum, or a diamond blade for tile is straightforward.

This saw is built for anyone who needs a portable, precise alternative to a table saw or a corded circular saw — cabinet installers cutting sheet stock on site, trim carpenters breaking down material for a run of doors, and remodeling crews who need clean cuts on countertops or wall cladding without running an extension cord across a job site. If your work is mostly rough framing where a standard corded circular saw already gets the job done, the guide rail system and thin-kerf precision here are more capability than you need — but for finish-level cuts on sheet goods and hardwood, this is the tool that removes the table saw from the truck.

Cordless Precision Without the Weight Penalty

The Festool TSC 55 KS proves you don't need two batteries strapped to a track saw to get cordless performance that holds up against the corded version.

• Who it's for: Cabinet installers, finish carpenters, and remodelers who need table-saw-quality cuts on sheet goods and hardwood without running a cord or hauling a table saw.
• Why it stands out: The single-battery design plus the included thin-kerf blade means less weight in your hands and more cuts per charge, without giving up the cutting depth or bevel range of the saw it replaces.
• Worth knowing: This is a bare-tool listing — no battery, charger, or guide rail included, so budget for those separately if you're starting from scratch.

• Does this come with a guide rail? No. The saw ships with a blade, dust bag, splinterguard, hex key, and Systainer case; guide rails are sold separately.
• How many batteries does it need? One. This saw runs on a single 18V battery, unlike the two-battery design of the SKU it replaces (576717).
• Can I use my existing Festool 18V batteries? Yes — it's optimized for the TBX 8 Tabless Battery but also runs on the standard 5.0Ah Li-HighPower pack.
• Does it have kickback protection? Yes, a sensor-based KickbackStop system helps arrest the motor and blade if the saw binds during a cut.