The CMT 190.504.11 Solid Carbide Up/Downcut Spiral Bit is a compression-style router bit engineered to deliver clean, chip-free surfaces on both faces of a workpiece in a single pass - making it a go-to choice for CNC through-cuts in plywood, MDF, laminates, melamine, and hardwoods. Built entirely from premium micrograin solid carbide and featuring a 2+2 tooth up/downcut spiral geometry, this 3/8 in. bit is designed for right-hand rotation and fits standard 3/8 in. shank collets on CNC routing machines, router tables, and handheld routers. Whether you are cutting cabinet panels, furniture components, or laminated sheet goods, this bit eliminates tearout on both the top and bottom face simultaneously - a result that would otherwise require multiple passes or sanding.

Key Features

• Solid Micrograin Carbide Construction - the entire body is manufactured from high-density carbide rather than a carbide-tipped steel body, delivering superior wear resistance, longer edge life, and the ability to withstand more resharpenings over the tool's lifespan.
• Up/Downcut Compression Geometry (2+2 Teeth) - two upcut flutes and two downcut flutes work simultaneously, pulling material toward the center of the cut from both faces. The result is a chip-free, tearout-free finish on the top and bottom surface in a single through-cut pass.
• 3/8 in. Diameter with 1 1/8 in. Cutting Height - a versatile cutting envelope suited to sheet goods and panel work, providing enough depth to clear standard plywood and MDF thicknesses while maintaining a compact tool diameter for fine detail routing.
• 9/32 in. Lower Cutting Height (I1) - the dedicated downcut portion of the flute geometry measures 9/32 in., ensuring the bottom face of the material is actively sheared cleanly before the full cutting height is engaged.
• 3/8 in. Shank - compatible with the vast majority of CNC routers, router tables, and handheld routers equipped with 3/8 in. collets, providing a secure, vibration-minimizing grip during operation.
• 3 in. Total Length - the extended overall length allows for sufficient collet engagement while still leaving adequate clearance above the workpiece surface for most CNC spindle and router table setups.
• Right-Hand (RH) Rotation - standard right-hand rotation is compatible with conventional router spindle direction, requiring no special machine configuration or collet adapters.

Why This Product

• When routing through sheet goods like plywood, MDF, or melamine, tearout on one or both faces is a common problem with standard upcut or downcut spiral bits - this compression bit solves that by cutting both surfaces cleanly in one pass, reducing finishing time and material waste.
• The all-solid-carbide body holds a sharper edge longer than carbide-tipped alternatives and can be resharpened more times, making it a cost-effective choice for shops that run high volumes of panel and laminate cuts.
• With a 3/8 in. shank and 3/8 in. cutting diameter, this bit fits a wide range of CNC machines and router tables without requiring adapters, making it an accessible upgrade for production and hobbyist shops alike.
• The 2+2 tooth configuration balances cutting speed and surface finish - two upcut flutes clear chips efficiently while two downcut flutes keep the surface clean, reducing the need to slow feed rates to avoid tearout.

Specifications

• Manufacturer Part Number: 190.504.11
• Brand: CMT Orange Tools
• Diameter: 3/8 in.
• Cutting Height: 1 1/8 in.
• Lower Cutting Height: 9/32 in.
• Total Length: 3 in.
• Shank: 3/8 in.
• Number of Teeth: 2 + 2
• Blade Material: Solid Carbide
• Rotation: Right-Hand (RH)
• Product Type: Up/Downcut Spiral Router Bit

Approved Applications

• CNC Routing
• Through-Cuts in Plywood and MDF
• Two-Face Finish Cuts in Laminates and Melamine
• Router Table Operations
• Handheld Router Operations
• Panel Processing in Solid Hardwood and Softwood
• Chipboard and Plastic Cutting