The Kreg Adaptive Cutting System 40-Tooth Thin Kerf Saw Blade is the exclusive replacement blade for the Kreg 20V Ionic Drive 6-1/2 in. Plunge-Cut Track Saw. Model number KSBACS40TK. This is a battery-tool-specific blade — it's engineered around the reality that a cordless saw has finite runtime per charge, and every bit of unnecessary motor load cuts into that runtime.

The 1.6 mm thin-kerf design is the core idea behind this blade. Removing less material per cut means the motor works less hard for every pass, which directly extends how many cuts you get from a single battery charge — a meaningful difference on a jobsite where swapping and recharging batteries costs real time. Forty carbide-tipped teeth on the 6-1/2 in. plate keep the cut quality high despite the thinner kerf, so you're not trading battery efficiency for a rougher edge.

The laser-cut steel body with anti-vibration slots addresses a problem specific to smaller, faster-spinning blades: at up to 7,000 RPM on a compact 6-1/2 in. plate, vibration and chatter show up more readily than on a larger, slower blade. The relief slots cut into the body keep the plate quiet and stable through long rip cuts on plywood and sheet goods, which is exactly the kind of cutting the Adaptive Cutting System track saw setup is designed for.

This blade is purpose-built for one saw: the Kreg 20V Ionic Drive 6-1/2 in. Plunge-Cut Track Saw (KPTPS100A) and its battery-kit counterpart (KPTBPS100A). It is not compatible with Kreg's corded Adaptive Cutting System Plunge-Cut Track Saw — that saw uses a different blade in this same family. If you're not certain which track saw you own, check the model number before ordering a replacement blade.

Who should buy this: anyone running Kreg's cordless 6-1/2 in. plunge-cut track saw who needs a replacement or spare blade. Ripping down plywood and sheet goods on a job where recharging isn't convenient is exactly the scenario this blade is engineered for.

The blade that respects your battery

This thin-kerf blade is what makes Kreg's cordless track saw actually practical for a full day of ripping sheet goods on one charge.

• Who it's for: Anyone running the Kreg 20V Ionic Drive 6-1/2 in. Plunge-Cut Track Saw who needs a spare or replacement blade.
• Why it stands out: Thin kerf specifically engineered to lower motor load and extend cordless runtime, without giving up clean 40-tooth cut quality.
• Worth knowing: It's an exclusive fit — this blade does not work on the corded version of Kreg's Adaptive Cutting System track saw.

• Does this fit the corded Adaptive Cutting System track saw? No. This blade is built exclusively for the cordless Kreg 20V Ionic Drive 6-1/2 in. Plunge-Cut Track Saw.
• Why does a thinner kerf matter on a cordless saw? A thinner kerf removes less material per cut, which lowers motor load and stretches how many cuts you get per battery charge.
• What's the tooth count? 40 carbide-tipped teeth, suited to ripping and crosscutting solid wood, plywood, and sheet goods.