Product Description
The CMT Solid Carbide Upcut Spiral Bit - 1/4" x 3/4" x 2" is a precision-engineered spiral router bit built from solid super-micrograin carbide, designed to deliver clean, efficient cuts in a wide range of materials. With its upcut spiral geometry, this bit actively ejects chips upward out of the cut, keeping deep slots, pockets, and through-cuts clear of debris for consistent results. Whether you are running a CNC routing machine, a router table, or a handheld router, this 2-flute right-hand bit provides the clean bottom-face finish and reliable chip evacuation that demanding woodworking and fabrication applications require.
Key Features
- Solid Super-Micrograin Carbide Construction - the entire bit is manufactured from a special super-micrograin carbide formulation that holds a keen cutting edge longer than standard carbide, running cooler and extending the intervals between resharpenings.
- Low-Angle Upcut Spiral Geometry - specifically designed to shear wood cleanly while providing efficient chip ejection upward out of the cut, reducing heat buildup and keeping deep pockets and slots clear during routing.
- 2-Flute Configuration - the dual-flute design balances cutting speed and surface quality, producing a clean finish on the lower face of the cut while maintaining efficient material removal rates.
- 1/4" Shank Compatibility - the 1/4" shank fits a wide range of routers and CNC spindles, making this bit highly versatile for both production and hobby-level routing setups.
- 3/4" Cutting Height with 2" Total Length - the cutting height provides sufficient depth for through-cuts in common stock thicknesses, while the overall 2" length ensures clearance and stability during operation.
- Right-Hand Rotation - standard RH rotation is compatible with the vast majority of routers and CNC routing machines, requiring no special setup or spindle adjustment.
Why This Product
- The super-micrograin carbide formulation runs cooler than conventional carbide, which means less heat stress on the workpiece and longer edge life between sharpenings - a practical advantage for production routing in hardwood, plywood, and composite materials.
- The low-angle upcut spiral is engineered specifically for clean wood shearing and efficient chip ejection, making this bit a strong choice for deep pocket routing and through-cuts where chip buildup can degrade cut quality.
- Solid carbide construction - rather than carbide-tipped - means the bit can be resharpened more times over its service life, offering long-term value for users who regularly work with demanding materials like MDF, chipboard, laminates, and hardwood.
- With a 1/4" shank and standard right-hand rotation, this bit integrates seamlessly into CNC routing workflows and handheld router setups without the need for adapters or special tooling.
Specifications
- Manufacturer Part Number: 191.007.11
- Brand: CMT Orange Tools
- Product Type: Solid Carbide Upcut Spiral Bit
- Diameter: 1/4"
- Cutting Height: 3/4"
- Total Length: 2"
- Shank: 1/4"
- Number of Teeth: 2
- Material: Solid Carbide (Super-Micrograin)
- Rotation: Right-Hand (RH)
Approved Applications
- CNC Routing
- Through-Cuts
- Deep Pocket Routing
- Chip Evacuation Routing
- Solid Hardwood
- Softwood
- Plywood
- MDF
- Chipboard
- Laminates
- Melamine
- Plastic
Frequently Asked Questions
What is the difference between an upcut spiral bit and a downcut spiral bit?
An upcut spiral bit ejects chips upward out of the cut, which promotes efficient chip evacuation in deep slots, pockets, and through-cuts. This geometry produces the cleanest finish on the bottom face of the workpiece. A downcut spiral bit, by contrast, pushes chips downward and produces a cleaner finish on the top face. The CMT 191.007.11 uses upcut geometry, making it well suited for applications where bottom-face finish quality and chip clearing are the priority.
What machines is this bit compatible with?
This bit is compatible with CNC routing machines, router tables, and handheld routers that accept a 1/4" shank. Its standard right-hand rotation is consistent with the vast majority of routing equipment, so no special spindle configuration is required.
Why is solid carbide preferred over carbide-tipped for spiral router bits?
Solid carbide construction - as used in the CMT 191.007.11 - allows the entire body of the bit to be resharpened, which means more resharpenings are possible over the life of the tool compared to carbide-tipped alternatives. The super-micrograin carbide formulation also holds a keen cutting edge longer and runs cooler, which reduces heat-related wear on both the bit and the workpiece.
What materials can this spiral bit cut?
This bit is suitable for routing solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic. The low-angle upcut spiral is specifically designed to shear wood cleanly and eject chips efficiently, making it effective across this range of common woodworking and fabrication materials.
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