The CMT 380.040.11 solid carbide router bit for Festool Domino DF500 is a 4 mm joinery cutter built for Domino mortising work. This is a router bit designed for Domino joining and precise wood joinery. Model Number: 380.040.11. If you run a Festool DF500 and need a replacement cutter that matches the machine's job, this bit is built for exactly that.

What matters here is the combination of size, material, and machine-specific fit. The 4 mm cutting diameter is aimed at smaller, accurate mortises, while the solid carbide construction is there for long service life under repeated use. On real joinery work, that means you get a cutter that is made to stay sharp longer and keep the mortise clean and predictable.

CMT also uses a PTFE coating on this bit. That is not just a line on a spec sheet. The coating helps reduce residue buildup and helps control heat during use, which is a practical advantage when you are cutting multiple mortises back to back. Less buildup means less cleanup on the bit and less drag while cutting.

This cutter uses a straight shank and is specified with an M6 x 0 thread interface, making it a dedicated accessory rather than a generic bit you force into the wrong setup. That machine-specific fit is the whole point. If you are using a Festool Domino DF500, you want a cutter that installs correctly and works the way the joiner was designed to work.

For woodworking, cabinetry, furniture work, and finish carpentry, cutter quality shows up fast. A cheap bit can create rougher mortises, run hotter, and wear out sooner. A solid carbide Domino cutter like this one is a better choice when accuracy and repeatability matter more than saving a few bucks on a consumable.

The best buyer for this bit is the user who already owns a Festool DF500 and wants a replacement or spare 4 mm Domino cutter from a known cutting-tool brand. It makes sense for cabinet shops, trim carpenters, furniture builders, and serious DIY users doing clean joinery work where consistent fit matters.

CMT 380.040.11 Solid Carbide Router Bit for Festool Domino DF500

This is a smart buy for DF500 owners who want a proper 4 mm replacement cutter from a brand that knows cutting tools.

• Who it's for: Woodworkers, cabinet installers, trim carpenters, and furniture builders using a Festool Domino DF500 for accurate loose-tenon joinery.
• Why it stands out: Solid carbide construction, PTFE coating, and machine-specific fit give it the kind of practical reliability that matters more than fancy packaging.
• Worth knowing: This is a dedicated Domino joiner cutter, not a general-purpose router bit, so make sure you are buying it for a DF500 setup and for 4 mm joinery work.

• What machine is this bit made for? It is designed for Festool Domino DF500 joining machines.
• What is the cutting diameter? The cutting diameter is 4 mm.
• What is the bit made from? It is made from solid carbide.
• Does it have a protective coating? Yes. It features a PTFE coating to help reduce residue buildup and heat.