Product Description
CMT 190.008.11 Solid Carbide Up/Downcut Spiral Router Bit - 1/4" Diameter by CMT is a precision-engineered compression spiral cutting tool designed for CNC routers, router tables, and handheld routers where chip-free results on both faces of the workpiece are required. With simultaneous upcut and downcut spiral geometry, this bit produces clean, tear-out-free surfaces on both the top and bottom of the material in a single through-cut pass - making it the right choice for demanding finish work in plywood, MDF, laminates, melamine, and solid wood. Manufactured entirely from solid carbide micrograin material, it delivers the rigidity and edge retention needed for high-volume production routing and precision joinery applications alike.
Key Features
- Solid Carbide Construction (Material: HWM) - the entire bit body is machined from premium micrograin carbide rather than a softer steel body with carbide tips, providing superior rigidity, reduced deflection, and significantly greater wear resistance for longer intervals between resharpenings.
- Up/Downcut Compression Spiral Geometry (Z2+2 configuration) - the 2 upcut and 2 downcut flutes work simultaneously to shear material cleanly from both faces of the workpiece, eliminating surface tearout on the top and bottom in a single through-cut pass - ideal for finished panel goods, laminated boards, and veneered sheet materials.
- 1/4" Cutting Diameter with 7/8" Cutting Height - the primary cutting zone handles full-depth through-cuts in common sheet material thicknesses, while the 9/32" secondary cutting height (I1) extends cutting versatility for stepped or layered workpieces.
- 1/4" Shank Diameter - 2 1/2" Total Length - the 1/4" shank fits a wide range of collets used in CNC spindles, router tables, and handheld routers, while the 2 1/2" overall length provides sufficient reach for through-cuts without sacrificing rigidity.
- Right-Hand (RH) Rotation - compatible with all standard right-hand spindles used in production CNC routing machines and conventional router setups, ensuring straightforward integration without special toolholding requirements.
- CMT Orange Shield Non-Stick Coating - the protective coating resists pitch and resin buildup on the bit body, reduces heat accumulation during cutting, and guards against corrosion during storage and use, extending overall tool life and keeping the bit performing cleanly between sharpenings.
Why This Product
- Both-face surface quality in one pass - because the compression geometry cuts upward and downward at the same time, plywood, MDF, and laminated panels come off the CNC table with clean, unblemished surfaces on the top and bottom face - eliminating the need for sanding or secondary finishing of cut edges.
- Built for CNC routing of sheet goods - the 1/4" diameter, 7/8" cutting height, and 2 1/2" total length are specifically proportioned for through-cuts in common sheet panel thicknesses, and the solid carbide construction handles the feed rates and spindle speeds typical of production CNC environments without chipping or deflecting.
- Longer tool life than carbide-tipped alternatives - solid carbide construction throughout the full body allows for multiple resharpenings that restore a like-new cutting edge, reducing long-term tooling cost per cut compared to bits where only the tips are carbide and the body is steel.
- Versatile material compatibility - the compression spiral geometry and solid carbide cutting edge handle a broad range of materials including solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic, making this a single tool capable of addressing multiple routing applications across different material types.
Specifications
- Manufacturer Part Number: 190.008.11
- Brand: CMT Orange Tools
- Product Type: Solid Carbide Up/Downcut Spiral Router Bit
- Diameter: 1/4"
- Cutting Height: 7/8"
- Cutting Height (I1): 9/32"
- Total Length: 2 1/2"
- Shank Diameter: 1/4"
- Number of Teeth: 2 + 2
- Rotation: Right-Hand (RH)
- Blade Material: Solid Carbide (HWM)
- Macro Class: Router Cutter
Approved Applications
- CNC Routing
- Through-Cuts in Plywood and MDF
- Two-Face Finish Cuts in Laminated and Veneered Panels
- Router Table Routing
- Handheld Router Routing
- Cutting in Solid Hardwood and Softwood
- Cutting in Chipboard, Melamine, and Plastic
Frequently Asked Questions
What is the difference between the two cutting height dimensions listed - 7/8" and 9/32"?
This bit has two distinct cutting zones. The primary cutting height of 7/8" is the main flute length that handles the bulk of the material removal during a through-cut. The secondary cutting height of 9/32" (the I1 dimension) refers to a shorter cutting section within the compression geometry - typically the downcut portion - that shears the opposite face of the workpiece cleanly. Together, the 2 upcut and 2 downcut flutes produce a chip-free surface on both faces simultaneously.
What materials can this compression spiral bit cut cleanly?
The solid carbide up/downcut geometry is suited for cutting solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic. The compression cutting action is especially effective on sheet goods where tearout or surface splintering on the top or bottom face would otherwise be a problem.
What machines is this bit compatible with?
The 1/4" shank fits standard collets used in CNC routing machines, router tables, and handheld routers that accept right-hand rotation tooling. Confirm your machine or router accepts a 1/4" shank before use.
Can this solid carbide bit be resharpened?
Yes. Because the entire bit is manufactured from solid carbide rather than a steel body with carbide tips bonded on, the cutting edges can be resharpened multiple times by a qualified sharpening service, restoring cutting performance and extending the usable life of the tool significantly compared to carbide-tipped designs.
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