Product Description
The CMT 190.507.11 Solid Carbide Up/Downcut Spiral Bit is a professional-grade compression router bit engineered for clean, chip-free cuts on both faces of sheet goods. With simultaneous upcut and downcut spiral geometry, this 1/2 in. bit applies cutting force from both directions at once, eliminating tearout on the top and bottom surfaces of the workpiece - a critical advantage when routing plywood, MDF, melamine, and laminated panels on CNC machines or router tables. Manufactured entirely from premium solid carbide, it delivers the edge retention and resharpenability that demanding production environments require.
Key Features
- Solid Carbide Construction - the entire bit body is formed from micrograin carbide rather than a steel body with carbide tips, providing superior wear resistance, longer cutting life, and the ability to withstand more resharpenings before replacement is needed.
- Up/Downcut Compression Geometry (2 + 2 Teeth) - the 2 upcut and 2 downcut flutes work simultaneously to shear both the top and bottom faces of the workpiece cleanly, eliminating tearout and delamination on veneered plywood, MDF, laminates, and melamine without requiring additional finishing passes.
- 1/2 in. Shank Diameter - the full 1/2 in. shank seats securely in 1/2 in. collets on CNC routers and router tables, reducing vibration and runout for straighter, more accurate cuts compared to smaller shank sizes.
- 1 3/8 in. Cutting Height with 15/32 in. Lower Cutting Zone - the generous overall cutting height accommodates common sheet material thicknesses, while the precise lower cutting zone measurement allows accurate setup for compression cuts where the downcut zone must fully engage the bottom face of the material.
- Right-Hand (RH) Rotation - standard right-hand rotation is compatible with the vast majority of CNC routing machines and handheld routers, ensuring straightforward installation without special toolholder requirements.
- 3 1/2 in. Total Length - the overall length provides sufficient clearance for use in typical CNC spindle and router table setups, keeping the bit stable at operating depth without excessive overhang.
- CMT Orange Shield Non-Stick Coating - the proprietary anti-friction coating reduces heat buildup during cutting, resists pitch and resin adhesion, and protects the carbide body from corrosion, collectively extending tool life and maintaining cutting performance over repeated use.
Why This Product
- Two-face tearout elimination in a single pass - because the 2 + 2 up/downcut flutes attack both surfaces simultaneously, routers and CNC operators get chip-free top and bottom faces on through-cuts without flipping the workpiece or running secondary cleanup passes.
- Built for production-grade sheet cutting - the solid carbide body holds a sharper edge longer than carbide-tipped alternatives, making this bit a practical choice for repetitive CNC routing of plywood, MDF, chipboard, laminates, melamine, and plastics where edge quality and tool longevity both matter.
- Precise setup for compression geometry - the explicitly specified 15/32 in. lower cutting height gives operators a defined measurement to verify that the downcut portion engages the bottom face of the material fully, taking the guesswork out of bit depth setup for true compression cutting.
- Broad machine compatibility on a standard 1/2 in. shank - the 1/2 in. shank fits CNC routing machines, router tables, and handheld routers with standard 1/2 in. collets, so the same bit transitions across different machines without adapters or specialty toolholders.
Specifications
- Manufacturer Part Number: 190.507.11
- Brand: CMT Orange Tools
- Product Type: Solid Carbide Up/Downcut Spiral Router Bit
- Diameter: 1/2 in.
- Cutting Height: 1 3/8 in.
- Lower Cutting Height: 15/32 in.
- Total Length: 3 1/2 in.
- Shank Diameter: 1/2 in.
- Number of Teeth: 2 + 2
- Blade Material: Solid Carbide
- Rotation: Right-Hand (RH)
- Compatible Material: HWM
Approved Applications
- CNC Routing
- Through-Cuts in Plywood and MDF
- Two-Face Finish Cuts on Veneered Sheet Goods
- Compression Routing in Laminates and Melamine
- Panel Processing on Router Tables
- Routing Solid Hardwood and Softwood
- Cutting Chipboard and Plastics
Frequently Asked Questions
What does the "2 + 2" tooth count mean, and why does it matter?
The 2 + 2 designation means this bit has 2 upcut flutes and 2 downcut flutes. The upcut flutes pull chips upward and lift the top face, while the downcut flutes push chips downward and press the bottom face. Working together, they apply shearing force to both surfaces simultaneously - this compression action is what eliminates tearout and delamination on both faces of the workpiece in a single through-cut pass.
How do I set the bit depth correctly to achieve true compression cutting?
For proper compression cutting, the downcut portion of the flutes - which measures 15/32 in. on this bit - must fully engage and shear the bottom face of the material being cut. Set your bit height so the downcut zone exits through the underside of the workpiece. This ensures both the upcut and downcut sections are actively cutting their respective faces at the same time.
What machines is this bit compatible with?
This bit has a 1/2 in. shank and right-hand rotation, which are standard specifications for CNC routing machines, router tables, and handheld routers equipped with a 1/2 in. collet. Always confirm that your machine's spindle speed is appropriate for the bit diameter and the material being routed before use.
Can this bit be resharpened, and does solid carbide construction affect that?
Yes. Solid carbide bits are well suited to resharpening. Because the entire cutting body is formed from carbide rather than relying on brazed carbide tips bonded to a steel body, there is substantially more carbide material available to be ground back during resharpening - allowing more resharpen cycles over the life of the tool compared to carbide-tipped bits of equivalent diameter.
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