The CMT Solid Surface Rounding Over Bit (838.147.11) is a precision-ground carbide-tipped router bit designed to produce smooth, consistent roundover edge profiles on solid surface materials and a wide range of woodworking substrates. Built on a 1/4" shank with a 3/64" radius, this compact bit is ideal for softening sharp corners, finishing laminate edges, and adding refined decorative profiles to furniture, cabinetry, and paneling. With a right-hand rotation, 2-flute design, and hardmetal (HW) carbide cutting edges, it delivers clean, repeatable results in handheld router and router table applications alike.

Key Features

• Hardmetal (HW) Carbide-Tipped Cutting Edges - durable carbide tips maintain a sharp cutting edge through extended use on solid surface, hardwood, softwood, and laminate materials, reducing the frequency of bit replacement.
• 3/64" Radius Profile - this small, precise radius produces a delicate roundover that softens edges without removing significant material, making it well-suited for detail work, laminate finishing, and decorative edge treatments.
• 1/4" Shank Diameter - compatible with a wide range of handheld routers and compact router tables that accept standard 1/4" collets, adding versatility across tool setups.
• 2-Flute Design - dual cutting edges provide balanced material removal and a smoother surface finish with each pass, improving cut quality and reducing tear-out.
• Right-Hand Rotation (RH) - matches the standard rotation direction of most routers, ensuring safe and proper engagement with the workpiece.
• Ball-Bearing Pilot Guide - the integrated bearing rides along the edge of the workpiece to maintain consistent cutting depth and profile accuracy without the need for a fence, making edge profiling straightforward and repeatable.
• Solid Surface Optimized Geometry - engineered specifically for solid surface materials, this bit produces clean profiles that require minimal sanding or post-processing.
• 2" Total Length - compact overall length makes this bit easy to control in handheld routing applications and compatible with a variety of router configurations.

Why This Product

• Purpose-built for solid surface work - the 838.147.11 is specifically designed for solid surface routing applications, making it a more reliable choice than general-purpose roundover bits when working with these materials. The geometry and carbide grade are matched to the demands of solid surface fabrication.
• Delicate 3/64" radius for refined edge detailing - when a full roundover would be too aggressive, this small radius delivers a subtle, controlled profile that enhances the appearance of edges on furniture, countertops, and laminate panels without compromising the material's integrity.
• Bearing-guided for hands-free depth control - the ball-bearing pilot eliminates the need for a fence or guide in many applications, allowing the bit to self-reference the workpiece edge and deliver uniform profiles across long runs and curved edges.
• Compact 1/4" shank broadens router compatibility - the 1/4" shank makes this bit accessible to a wide range of compact and mid-size routers, so fabricators and woodworkers can use it across multiple tool setups without needing an adapter or specialty collet.

Specifications

• Manufacturer Part Number: 838.147.11
• Brand: CMT Orange Tools
• Diameter: 37/64"
• Cutting Height: 25/64"
• Total Length: 2"
• Radius: 3/64"
• Shank: 1/4"
• Number of Teeth: 2
• Material: HW (Hardmetal Carbide)
• Rotation: Right-Hand (RH)
• Bit Type: Roundover Bit

Approved Applications

• Rounding over edges on solid surface materials
• Softening sharp corners on furniture and cabinetry
• Finishing laminate edges - virtually eliminates the filing required when using conventional trim bits
• Edge profiling on hardwood and softwood panels
• Decorative edge detailing on countertops and paneling