The CMT Contractor Round Nose Bit is a precision-ground routing bit engineered for professional sign makers, cabinet makers, and woodworkers who demand clean, smooth semi-circular profiles in every pass. With a 5/8 in. cutting diameter, 1/2 in. cutting height, and a 3/8 in. full radius, this bit carves consistent coves, flutes, and decorative grooves in solid wood, sheet goods, and wood-based composites. The 1/4 in. shank makes it compatible with a wide range of handheld routers and router tables, giving craftsmen the flexibility to take on decorative door panels, drawer fronts, custom signage, and creative accent work with confidence.

Key Features

• 5/8 in. cutting diameter with 1/2 in. cutting height - delivers a generous material contact zone that shapes full, consistent coves and decorative grooves in a single pass, reducing the need for multiple setups.
• 3/8 in. full radius profile - produces smooth, symmetrical semi-circular channels ideal for fluting columns, veining panels, crafting decorative signs, and adding refined detail to cabinet doors and drawer fronts.
• 2-flute carbide-tipped (HW) cutting edges - two carbide tips work together to produce a cleaner surface finish with less tearout, extending usable tool life compared to high-speed steel alternatives in wood and wood products.
• Right-hand (RH) rotation - matches the standard rotation direction of handheld routers and router tables, ensuring proper chip ejection and safe, predictable cutting behavior.
• 1/4 in. shank diameter - fits a wide variety of router collets including compact trim routers and full-size machines, making this bit versatile across different tool setups and job site configurations.
• 1 3/4 in. total length - a compact overall profile that maintains rigidity during routing, helping reduce chatter and vibration for cleaner decorative results.

Why This Product

• Designed specifically for decorative and cabinet work, this round nose bit handles fluting, veining, and cove routing in one tool - eliminating the need to switch between multiple profile bits for common sign and cabinetry applications.
• The two carbide-tipped cutting edges provide smooth material removal in solid wood, plywood, MDF, and similar sheet goods, making this bit practical for both shop production and custom one-off projects.
• The 1/4 in. shank gives woodworkers the freedom to use this bit in compact trim routers as well as larger router table setups, broadening the range of creative projects it can support without requiring a dedicated machine.
• At 1 3/4 in. total length, the bit maintains a stable, low-profile stance during use, which is especially valuable when routing decorative details where precision and repeatability are critical to the final appearance.

Specifications

• Manufacturer Part Number: 81412
• Brand: CMT Orange Tools
• Diameter: 5/8 in.
• Cutting Height: 1/2 in.
• Total Length: 1 3/4 in.
• Radius: 5/16 in.
• Shank: 1/4 in.
• Number of Teeth: 2
• Blade Material: Carbide-Tipped (HW)
• Rotation: Right-Hand (RH)

Approved Applications

• Routing semi-circular coves and decorative grooves
• Fluting columns, legs, and architectural millwork
• Veining and inlay channel work
• Decorative sign making
• Cabinet door and drawer front detailing
• Creative accent routing on wood and wood-based products