The CMT Precision 6" Dado Set is a professional-grade stacked dado set engineered for woodworkers who demand clean, flat-bottomed grooves in solid hardwood, softwood, veneered plywood, melamine, and laminate. Built around two 6-inch outer blades with a 20-tooth ATB + FLAT tooth configuration and a -12 deg. negative hook angle, this dado set produces virtually splinter-free sidewalls and glass-smooth groove bottoms across a continuously adjustable kerf range of 1/4 inch to 29/32 inch. Whether you are routing dadoes for cabinet carcasses, cutting rabbets for drawer boxes, or building box joints on the table saw, this CMT precision set delivers consistent, repeatable results with a maximum speed of 9,000 RPM.

Key Features

• ATB + FLAT Tooth Geometry (ATB 20 + FLAT): The alternate top bevel grind on the outer blades shears wood fibers cleanly at the groove edges, while the flat chippers sweep the bottom level - together eliminating tearout and reducing cleanup time on finished panels and veneered materials.
• -12 deg. Negative Hook Angle: A negative cutting angle slows the blade's bite into the workpiece, giving the operator more control and producing a smoother cut surface, especially critical when working with melamine, laminate, and other chip-prone sheet goods.
• 6-inch Blade Diameter with 5/8-inch Bore (15.88mm): The 5/8-inch arbor bore is the standard fit for virtually all stationary table saws and radial arm saws, ensuring broad compatibility without adapters or modifications.
• 20 + 20 Teeth Across Two Outer Blades: A higher tooth count per outer blade means more cutting edges engage the wood with each rotation, translating to finer surface quality and less sanding required after milling grooves.
• Adjustable Kerf from 1/4 inch to 29/32 inch: The wide kerf range covers standard shelf dadoes, drawer-bottom grooves, T-track slots, and custom-width box joints - a single set handles the full spectrum of common woodworking groove cuts.
• 9,000 RPM Maximum Speed Rating: Rated for the high spindle speeds of production table saws, the set maintains safe operating limits while keeping feed rates efficient in both shop and job-site environments.
• Hardmetal (HW) Carbide Cutting Material: Tungsten carbide tips resist heat buildup and maintain a sharp cutting edge significantly longer than steel alternatives, reducing resharpening frequency and extending the operational life of the set.
• Inside Blade Chippers - 3.2mm (4 pc), 2.4mm (1 pc), 1.6mm (1 pc): Multiple chipper thicknesses allow precise, fine-tuned groove width adjustments in small increments, so you can dial in an exact fit for shelf stock, plywood panels, or router table inserts without compromising fit quality.

Why This Product

• The -12 deg. negative hook angle combined with the ATB outer blades makes this dado set particularly well-suited for splinter-sensitive materials like melamine and veneered plywood, where tearout along groove edges would otherwise require additional finishing work.
• With six individual chipper blades in three different thicknesses (3.2mm, 2.4mm, and 1.6mm), the set provides exceptionally fine-grained control over groove width across the full 1/4-inch to 29/32-inch range - making it practical for precision cabinetry where an imprecise dado fit is not acceptable.
• The hardmetal (HW) carbide construction means the set stays sharp through demanding production runs in hardwood and engineered sheet goods, lowering the total cost of ownership compared to sets that require more frequent resharpening or replacement.
• At a 9,000 RPM maximum speed rating and a standard 5/8-inch bore, this set is ready to mount and run on most table saws found in professional and serious hobbyist shops without any additional hardware or adapter bushings.

Specifications

• Manufacturer Part Number: 230.520.06
• Brand: CMT Orange Tools
• Blade Diameter: 6 in.
• Bore Diameter: 15.88mm (5/8 in.)
• Number of Teeth: 20 + 20
• Tooth Grind: ATB 20 + FLAT
• Cutting Angle: -12 deg.
• Kerf Width Range: 1/4 in. to 29/32 in.
• Maximum Speed: 9,000 RPM
• Cutting Material: HW (Hardmetal Carbide)
• Inside Blade Chippers: 3.2mm (4 pc), 2.4mm (1 pc), 1.6mm (1 pc)

Approved Applications

• Dadoes in solid hardwood and softwood
• Rabbets on cabinet panels and drawer components
• Grooves in veneered plywood and sheet goods
• Precision cuts in melamine and laminate panels
• Box joints on the table saw

What's Included

• 2x outer saw blades - 6 in. diameter, 20 teeth each, ATB 20 + FLAT, 5/8 in. bore
• 4x inside chippers - 3.2mm wide
• 1x inside chipper - 2.4mm wide
• 1x inside chipper - 1.6mm wide

Frequently Asked Questions

What table saw arbor size does this dado set fit?

The outer blades have a 5/8-inch (15.88mm) bore, which is the standard arbor diameter on the vast majority of stationary table saws and radial arm saws. No adapter bushing is required for machines with a standard 5/8-inch arbor.

What is the narrowest and widest groove this dado set can cut?

By combining the two outer blades and selecting from the included chipper blades (3.2mm, 2.4mm, and 1.6mm thicknesses), the set covers a continuously adjustable kerf range from 1/4 inch up to 29/32 inch.

Why does this dado set use a negative hook angle?

The -12 deg. negative hook angle reduces the aggressiveness of the blade's bite into the material. This controlled cutting action is especially beneficial when working with laminate, melamine, and veneered plywood, where a more aggressive positive hook angle could cause chipout or tearout along the groove edges.

What materials can this dado set cut cleanly?

The ATB 20 + FLAT tooth configuration and -12 deg. cutting angle are suited for precision dado cuts in solid hardwood, softwood, veneered plywood, melamine, and laminate panels. The outer blades' alternate top bevel grind shears fibers at the groove walls for clean, splinter-free results across these material types.