CMT 818.133.11 Dovetail Bit by CMT is a precision-ground routing bit engineered for the beautifully crafted dovetail joint - a classic woodworking connection that appeals to professionals and hobbyists alike. With a 1/2 in. cutting diameter, a 10 deg. angle, and a 1/4 in. shank, this bit is specifically designed for use with the Incra joinery system, making it an ideal choice for routing accurate sliding dovetails, drawer boxes, and interlocking wood joints. Featuring a 2-flute hardwood-grade carbide construction and right-hand rotation, this dovetail router bit delivers the consistency and clean profile needed for tight-fitting, gap-free joints in solid wood and sheet goods.

Key Features

• 10 deg. dovetail angle - produces the characteristic trapezoidal profile required for traditional dovetail joinery, ensuring tight mechanical interlock without glue dependency.
• 1/2 in. cutting diameter - provides a substantial cutting width suited for full-depth dovetail sockets and sliding dovetail channels in a single pass.
• 5/8 in. cutting height - allows routing of dovetail profiles with enough depth for structural drawer construction and box joinery.
• 1/4 in. shank - compatible with compact routers and standard router collets, giving woodworkers versatility across handheld and table-mounted setups.
• 2-flute (2-tooth) design - balances material removal rate with surface quality, reducing tearout and producing clean, crisp dovetail walls.
• HW (hardwood carbide) cutting material - delivers long cutting life in solid hardwoods and composite sheet materials, resisting edge wear over extended use.
• Right-hand (RH) rotation - matches the standard rotation of virtually all handheld routers and router tables, ensuring correct feed direction and safe operation.
• Incra system compatible - engineered to work precisely with the Incra joinery jig system for repeatable, accurately positioned dovetail cuts on every pass.
• 2-3/8 in. total length - provides adequate reach and shank engagement for secure chuck grip while maintaining bit stiffness and reducing deflection.

Why This Product

• Designed specifically for the Incra system, this bit takes the guesswork out of dovetail layout - the 10 deg. angle and 1/2 in. diameter are matched to Incra jig geometry for perfectly repeatable joints without trial-and-error setup.
• The 2-flute hardwood carbide construction means the bit stays sharp longer when cutting demanding materials like oak, maple, and walnut - reducing the need for frequent bit changes during production runs.
• At 5/8 in. cutting height combined with a 1/2 in. diameter, this bit is proportioned for practical drawer and box joinery - deep enough for a strong mechanical joint without over-routing thin stock.
• The compact 1/4 in. shank opens up compatibility with a wide range of compact and mid-size routers, making dovetail joinery accessible whether you are working at a dedicated router table or freehand with a trim router.

Specifications

• Manufacturer Part Number: 818.133.11
• Brand: CMT Orange Tools
• Diameter: 1/2 in.
• Angle: 10 deg.
• Shank: 1/4 in.
• Cutting Height: 5/8 in.
• Total Length: 2-3/8 in.
• Number of Teeth: 2
• Cutting Material: HW
• Rotation: Right-hand (RH)

Approved Applications

• Dovetail joints in solid hardwood and softwood
• Sliding dovetail joinery
• Drawer box construction
• Box and casework making
• Incra jig system routing