This is a saw-mounted dust collection bag designed for cordless track saw cutting where running a hose back to an extractor isn't practical. The Festool Dust Collection Bag for TSC/HKC Track Saws (item number 578694) attaches directly to the saw and catches chips and dust at the source as you cut.

It replaces item number 500393 with one real functional change: the bag now uses a spring-loaded flap that pops open for use and folds flat for storage, all without removing the bag from the saw. The previous version used a zip fastener you had to open every time you wanted to empty it — this one skips that step entirely.

Compatibility has also grown. Where the outgoing bag covered the TSC 55, TSC 55 K, and HKC 55, this one explicitly adds the newer TSC 55 KS and HKC 55 K to the list, so it fits the current lineup of Festool cordless track saws.

Because it mounts on the saw itself, there's no hose to snag on material and no cord or extractor to find power for — you get dust capture on cuts made away from a shop or in spots where a corded extractor can't reach.

This is the accessory for anyone running a TSC 55 or HKC 55 series saw off battery power on a remodel, deck, or trim job who wants to keep dust down without dragging a vacuum around. It's not a replacement for a real extractor when you're cutting all day in a shop — it's the mobility option for cuts on the go.

Dust Control for the Cuts Away From Your Extractor

The Festool Dust Collection Bag for TSC/HKC Track Saws is the answer for cordless cutting where dragging a hose and an extractor to the cut just isn't happening.

• Who it's for: Anyone running a TSC 55 or HKC 55 series saw on battery power away from a shop — decks, remodels, trim jobs on site.
• Why it stands out: The new spring-loaded flap opens and folds flat without ever coming off the saw, and coverage now explicitly includes the TSC 55 KS and HKC 55 K.
• Worth knowing: It's a bag, not a substitute for a real dust extractor — great for mobility and light cutting, not for a full day of high-volume ripping in a shop.

• What saws does this bag fit? Festool TSC 55, TSC 55 K, TSC 55 KS, HKC 55, and HKC 55 K cordless track saws.
• How is this different from the old dust bag, item number 500393? This version uses a spring-loaded flap that pops open and folds flat without removing the bag from the saw, instead of the old zip fastener, and it adds explicit compatibility with the TSC 55 KS and HKC 55 K.
• Do I still need a dust extractor with my track saw? No — this bag is designed to capture dust at the cut without one, which is the point for cordless work away from power.