The CMT Tongue and Groove Set - 1-7/8 in. x 3/4 in., 1/2 in. Shank is a precision-engineered router bit set designed to create tight-fitting tongue and groove joints in solid wood panels, cabinet components, and furniture projects. CMT engineered this set so woodworkers can mill both the groove slot and the matching tongue without repeatedly disassembling and reconfiguring a single bit - a significant time saver on production runs and DIY projects alike. The set handles stock up to 3/4 in. thickness, making it well suited for flooring, paneling, box construction, and casework applications.

Key Features

• Two-bit tongue and groove system - one bit cuts the groove slot and a separate bit mills the tongue, eliminating the need to disassemble and reassemble a single cutter between passes and reducing setup time considerably.
• Cuts stock up to 3/4 in. thickness - matches the most common lumber and panel dimensions used in cabinetry, paneling, and furniture, so the set handles real-world woodworking projects without modification.
• 1/2 in. shank diameter - provides a larger contact area in the router collet compared to 1/4 in. shank bits, reducing vibration and deflection for cleaner, more consistent cuts in hardwood and softwood alike.
• HW (hardmetal/carbide) cutting material - the tungsten carbide tips retain a sharp edge through extended production runs, making this set a practical choice for both occasional shop use and higher-volume work.
• 3-tooth cutting geometry - more cutting edges per revolution produce a smoother surface finish on groove walls and tongue faces, reducing the sanding and fitting time needed before glue-up.
• Right-hand rotation - compatible with all standard handheld routers and router tables, which rotate in the right-hand direction, so no special machine configuration is needed.
• 1-7/8 in. diameter - sized to produce a well-proportioned joint profile in panels up to 3/4 in. thick while remaining manageable in both table-mounted and handheld routing setups.

Why This Product

• Purpose-built as a matched set, these two bits are calibrated to produce a tongue that fits precisely into the groove they cut - eliminating the guesswork of mixing and matching individual bits from different manufacturers or grinding sessions.
• The dedicated groove bit and tongue bit design means you switch bits rather than disassemble a complex stacked cutter, cutting changeover time and reducing the risk of reassembly errors mid-project.
• With a cutting depth of 12.70 mm and a cutting height of 3/4 in., the set is engineered specifically for 3/4 in. stock - the standard thickness for cabinet boxes, wall paneling, tabletops, and solid wood flooring - making it a versatile addition to any woodworking shop.
• The 1/2 in. shank and 3-flute carbide construction deliver the rigidity and edge retention needed to produce clean, repeatable joints across hardwoods like oak and maple as well as softer materials, reducing tearout and glue-up rework.

Specifications

• Manufacturer Part Number: 800.626.11M
• Brand: CMT Orange Tools
• Diameter: 1-7/8 in.
• Cutting Depth: 12.70 mm
• Cutting Height: 3/4 in.
• Total Length: 2-51/64 in.
• Shank: 1/2 in.
• Number of Teeth: 3
• Material: HW
• Profile: A
• Rotation: RH (Right-Hand)

Approved Applications

• Tongue and groove joinery in solid hardwood and softwood up to 3/4 in. thickness
• Cabinet box and face frame panel assembly
• Wall and ceiling paneling installation
• Furniture panel construction and solid wood tabletop glue-ups
• Flooring and decorative millwork profiles