CMT Solid Carbide Downcut Spiral Router Bit - 5/16" Diameter is a precision-ground spiral routing tool engineered from a special super-micrograin carbide formulation designed to hold a keen cutting edge longer than standard carbide. The downcut spiral geometry presses chips downward into the workpiece, preventing tearout on the top surface and making this bit the right choice for routing veneer-faced panels, laminates, melamine, and any application where upper-face finish quality is critical. With a 1/2" shank, 1" cutting height, and 3" total length, this 5/16" spiral bit is well suited for use in CNC routing machines, router tables, and handheld routers across solid wood, wood composites, plastic materials, and laminates.

Key Features

• Super-Micrograin Solid Carbide Construction - the entire bit body is manufactured from a special super-micrograin carbide formulation that produces and holds a keen cutting edge, delivering superior wear resistance and allowing more resharpenings than carbide-tipped alternatives, lowering long-term cost per cut.
• Downcut Spiral Geometry - chips are directed downward into the cut, preventing tearout and fraying on the upper face of the workpiece, which is critical when routing veneered panels, laminates, melamine, and finished surfaces where surface quality matters.
• Low-Angle Spiral Design - the new low-angle spiral is designed specifically to shear wood cleanly and provide efficient chip ejection, so the tool runs cooler during operation and cutting edges last longer between sharpenings.
• 2-Flute Configuration - the two-tooth design balances chip clearance with cut quality, supporting smooth, consistent passes through solid hardwood, softwood, plywood, MDF, chipboard, and plastic materials.
• 1/2" Shank - the large-diameter shank provides a stable, secure grip in collet chucks, reducing vibration and improving cut accuracy in both handheld routers and CNC spindles.
• Right-Hand Rotation - compatible with standard right-hand collets and router spindles for straightforward setup without adapters or special tooling.
• Versatile Application Range - rated for cutting, copying, panel sizing, and general routing applications, making this a single bit that covers a wide range of shop and production tasks on multiple material types.

Why This Product

• When upper-face finish quality is the priority - such as routing laminate, melamine, or veneer-faced panels - the downcut spiral geometry prevents fraying and tearout at the top surface, eliminating the need for secondary sanding or repair passes.
• The super-micrograin carbide formulation holds a sharper edge longer than conventional carbide, meaning fewer bit changes during production runs and more consistent cut quality across solid wood, composites, laminates, and plastic materials.
• The low-angle spiral keeps the tool cooler during operation by ejecting chips efficiently, which reduces heat buildup, protects the cutting edge, and extends the working life of the bit in demanding routing applications.
• With a 1/2" shank and 3" total length, this bit fits standard router collets and provides enough reach for panel sizing, copying, and deep routing tasks on CNC machines and router tables without requiring special tooling setups.

Specifications

• Manufacturer Part Number: 192.501.11
• Brand: CMT Orange Tools
• Product Type: Solid Carbide Downcut Spiral Bit
• Diameter: 5/16"
• Cutting Height: 1"
• Total Length: 3"
• Shank: 1/2"
• Number of Teeth: 2
• Rotation: Right-Hand (RH)
• Material: HWM Solid Carbide
• Macro Class: Router Cutter

Approved Applications

• CNC Routing
• Upper-Face Finish Routing
• Veneer and Laminate Routing
• Melamine Routing
• Panel Sizing
• Copying and Template Routing
• General Routing on Solid Wood, Wood Composites, Plastic Materials, and Laminates