CMT Round Nose Bit - 5/8 in. Diameter, 5/16 in. Radius, 1/2 in. Shank by CMT is a precision carbide-tipped routing bit engineered to cut smooth, semi-circular coves and decorative grooves in wood and wood derivatives. With a full 5/8 in. cutting diameter and a 5/16 in. radius, this round nose (core box) style bit is the go-to choice for fluting, veining, and adding personalized decorative accents to doors, drawer fronts, panels, and virtually any wood surface. The 2-flute design delivers clean, consistent results whether you are working with solid hardwood, plywood, MDF, or other wood composites.

Key Features

• 5/8 in. Cutting Diameter with 5/16 in. Radius - produces a precise, uniform semi-circular profile that is ideal for decorative veining, cove routing, and fluting work on wood and wood derivative materials.
• 1 1/4 in. Cutting Height - generous depth capacity allows you to rout full decorative grooves in a single pass or make controlled depth-of-cut adjustments across a variety of workpiece thicknesses.
• Carbide-Tipped (HW) Flutes - hard carbide tipping maintains a sharp cutting edge far longer than high-speed steel alternatives, reducing the frequency of bit changes and keeping grooves crisp and clean through extended use.
• 2-Flute Design - dual flutes balance the cut for smoother chip evacuation and a finer surface finish, reducing the need for sanding or additional cleanup on routed profiles.
• 1/2 in. Shank - the larger 1/2 in. shank provides greater rigidity and reduced vibration compared to smaller shank sizes, resulting in straighter, more accurate cuts and improved router stability.
• Right-Hand (RH) Rotation - matches the standard rotation direction of the vast majority of handheld routers, router tables, and CNC routing machines for straightforward, compatible use without special setup.
• 2-7/8 in. Total Length - the overall bit length provides adequate clearance for collet engagement while keeping the bit compact enough for controlled, stable routing operations.

Why This Product

• The 5/16 in. radius produces a proportionally refined, decorative cove profile - well suited for personalizing cabinet doors, drawer fronts, and panel surfaces where visual detail matters.
• Carbide-tipped construction means this bit holds up through repeated passes in hardwood and composite materials, making it a durable tool for both occasional woodworking projects and more demanding production routing work.
• The 1/2 in. shank size is compatible with full-size routers, router tables, and CNC routing machines, giving this bit broad versatility across different setups without requiring adapters or special collets.
• At 1 1/4 in. of cutting height, this round nose bit handles a practical range of decorative groove depths, allowing the woodworker to achieve signature motifs and fluted accents in a single controlled routing operation.

Specifications

• Manufacturer Part Number: 814.660.11
• Brand: CMT Orange Tools
• Diameter: 5/8 in.
• Radius: 5/16 in.
• Shank: 1/2 in.
• Cutting Height: 1 1/4 in.
• Total Length: 2 7/8 in.
• Number of Flutes: 2
• Material: Carbide-Tipped (HW)
• Rotation: Right-Hand (RH)

Approved Applications

• Routing semi-circular coves and decorative grooves
• Fluting on doors, drawer fronts, and panels
• Veining and decorative accent routing
• Personalizing wood surfaces with signature motif profiles
• Decorative routing in solid hardwood, softwood, plywood, MDF, and wood derivatives