The CMT Solid Carbide Upcut Spiral Bit - 1/4 in. x 1 in. x 2-1/2 in. is a precision-ground routing tool engineered for clean, efficient material removal in solid hardwood, softwood, plywood, MDF, laminates, melamine, and plastics. Built from a special super-micrograin carbide formulation, this 2-flute upcut spiral bit runs cooler and holds a sharper cutting edge for longer than standard carbide tools - making it a reliable choice for CNC routing machines, router tables, and handheld routers alike. The upcut spiral geometry pulls chips upward and out of the cut, keeping deep slots and pockets clear of debris while delivering the cleanest possible finish on the bottom face of the workpiece.

Key Features

• Super-Micrograin Solid Carbide Construction - a special super-micrograin carbide formulation produces and holds a keen cutting edge longer than standard carbide, meaning fewer tool changes and more consistent results across high-volume CNC and handheld routing applications.
• Runs Cooler by Design - the micrograin carbide formulation allows the tool to run cooler during use, reducing heat-related wear and extending the usable life of the cutting edge - especially valuable in extended production runs or dense material cuts.
• Low-Angle Upcut Spiral Geometry - designed specifically to shear wood cleanly and provide efficient chip ejection, the new low-angle spiral lifts chips up and out of the cut path, keeping deep pockets and through-cuts free of debris and reducing the risk of recutting chips.
• 2-Flute Configuration - dual cutting edges balance chip load and feed rate efficiency, allowing smooth cuts in a wide range of materials including solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastics.
• Right-Hand Rotation - standard RH rotation is compatible with the vast majority of CNC routers, router tables, and handheld routers, making this bit a direct fit for most common setups without adapters or special toolholding.
• 1/4 in. Shank Diameter - fits collets commonly found on compact CNC machines and handheld routers, providing broad machine compatibility for shops of all sizes.

Why This Product

• The super-micrograin carbide formulation was created specifically to produce and hold a keen cutting edge - giving this bit longer edge retention compared to conventional carbide, which translates directly to more cuts per bit and lower tooling cost over time.
• The low-angle spiral design is engineered to shear wood cleanly rather than tear it, making this bit particularly well-suited for finish-quality through-cuts and deep pocket routing where surface quality on the lower face matters.
• Upcut chip ejection keeps deep slots and pockets clear during cutting, reducing heat buildup and the risk of chip-recutting - a practical advantage when routing MDF, plywood, or dense hardwoods where clogging can degrade cut quality.
• At 1 in. of cutting height on a 2-1/2 in. overall length with a 1/4 in. shank, this bit is sized for versatile use across a range of common CNC and router table applications without requiring extended-reach toolholding.

Specifications

• Manufacturer Part Number: 191.008.11
• Brand: CMT Orange Tools
• Product Type: Solid Carbide Upcut Spiral Bit
• Diameter: 1/4 in.
• Cutting Height: 1 in.
• Total Length: 2-1/2 in.
• Shank Diameter: 1/4 in.
• Number of Teeth: 2
• Rotation: Right-Hand (RH)
• Blade Material: Solid Carbide (Super-Micrograin)

Approved Applications

• CNC Routing
• Through-Cuts
• Deep Pocket Routing
• Chip Evacuation Routing in deep slots and pockets
• Solid Hardwood and Softwood routing
• Plywood, MDF, and Chipboard cutting
• Laminates, Melamine, and Plastic routing