CMT Bead and Bull Nose Router Bit - 1-3/8 in. Diameter x 1 in. Cutting Height, 3/8 in. Radius, 1/2 in. Shank by CMT is a professional-grade carbide-tipped routing bit engineered to mill elegantly rounded bead and bull nose profiles on wood edges in a single pass. Designed for use on router tables equipped with a fence, this bit is a precise, reliable choice for shaping stair treads, window sills, shelves, and furniture edges with a smooth, decorative full-round or semi-round bead profile. With a 2-tooth carbide cutting configuration and right-hand rotation, this bit delivers clean, consistent results on solid hardwood, softwood, and sheet goods alike.

Key Features

• Bead and Bull Nose Profile in One Pass - mills a complete rounded bead edge on stair treads, window sills, shelves, and furniture components without requiring multiple setups, saving time and improving consistency.
• 3/8 in. Radius - produces a proportional, elegant rounded profile suited to medium-thickness stock; for an extra-decorative look, use a bit with a bead diameter wider than the stock thickness.
• 1-3/8 in. Cutting Diameter with 1 in. Total Cutting Height - provides ample depth of engagement to shape a full bull nose or bead profile in material without compromising bit stability.
• HW (Hardmetal / Carbide) Cutting Material - tungsten carbide cutting edges retain sharpness through extended production runs on hardwoods, softwoods, plywood, and engineered panel products.
• 2-Flute Design - dual cutting edges balance chip load and heat generation, resulting in smoother cut surfaces and longer edge life between sharpenings.
• 1/2 in. Shank - the larger-diameter shank reduces vibration and deflection compared to 1/4 in. alternatives, improving cut quality and increasing control at the router table.
• Right-Hand Rotation - standard RH rotation is compatible with virtually all router table spindles, ensuring straightforward installation and safe, predictable operation.
• Router Table / Fence Required Design - the geometry of this bit is optimized for fence-guided router table use, providing controlled, repeatable passes that improve accuracy and operator safety.

Why This Product

• Creates professional bead and bull nose edge profiles on stair treads, window sills, and shelves in a single router table pass - eliminating the need for multiple bits or secondary sanding operations to achieve a finished look.
• The 1/2 in. shank pairs with the 1-3/8 in. carbide cutting head to keep the bit stable and reduce chatter at the router table, which is especially important when profiling longer workpieces like stair nosings and shelf edges.
• The 3/8 in. radius and 1-3/8 in. diameter are sized for versatile use across common furniture, millwork, and architectural woodworking stock thicknesses - and the option to select a bead diameter wider than the stock thickness opens up a broader range of decorative edge possibilities.
• Hardmetal carbide (HW) construction means the cutting edges hold up through repeated production passes on both solid wood and composite panels, reducing downtime for tool changes during active projects.

Specifications

• Manufacturer Part Number: 854.507.11
• Brand: CMT Orange Tools
• Diameter: 1-3/8 in.
• Cutting Height (Total): 1-3/8 in.
• Cutting Height (I1): 25/32 in.
• Total Length: 2-7/8 in.
• Radius: 3/8 in.
• Shank: 1/2 in.
• Number of Teeth: 2
• Cutting Material: HW (Hardmetal Carbide)
• Rotation: Right-Hand (RH)
• Bit Type: Bead and Bull Nose

Approved Applications

• Bull Nose Edge Profiles on Stair Treads
• Bead Profiles on Window Sills
• Decorative Edge Shaping on Shelves and Furniture Components
• Rounded Edge Finishing on Solid Hardwood and Softwood
• Edge Profiling on Engineered Wood Panel Products