CMT 822.320.11 Slot Cutter by CMT is a precision 3-flute slot cutter designed for routing clean, consistent grooves in a wide range of wood-based and composite materials. With a 1-7/8 in. cutting diameter and a 2mm kerf thickness, this right-hand rotation cutter excels at biscuit slot cutting, spline groove routing, panel joinery, and T-slot or H-slot work when paired with a compatible CMT 824 series arbor. Built from industrial-grade carbide-tipped (HW/TCT) material and engineered without an arbor for flexibility, it is well suited for use with handheld routers, router tables, and CNC routing machines.

Key Features

• 3-Flute Cutting Geometry - three carbide-tipped teeth distribute cutting load evenly, producing smoother slot surfaces with less vibration and cleaner entry and exit edges compared to single- or double-flute designs.
• 2mm Teeth Thickness / 0.051 in. Plate Thickness - the precise kerf width ensures accurate slot sizing for tight-fitting splines, biscuits, and panel connectors, reducing the need for secondary fitting or shimming.
• 1-7/8 in. Cutting Diameter - sized to reach full groove depth in a single pass on most standard joinery applications, improving efficiency and reducing setup time.
• 12.7mm Cutting Depth - sufficient depth capacity for biscuit joinery and spline grooves in solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic.
• 8mm Bore and 8mm Shank Compatibility - matches standard CMT 824 series arbors with an 8mm bore, providing a secure, concentric mount that maintains cutting accuracy at operating speeds.
• Right-Hand Rotation (RH) - designed for standard router spindle direction, compatible with the vast majority of handheld routers, router tables, and CNC routing machines without modification.
• HW (Carbide-Tipped) Construction - industrial-grade tungsten carbide tips deliver extended cutting life when working with abrasive materials such as MDF, chipboard, and melamine-faced panels.
• Arbor-Free Design - sold without an arbor, allowing the cutter to be paired with the specific CMT 824 series arbor that matches your application, giving you flexibility across multiple slot widths and stacking configurations.

Why This Product

• Accurate, repeatable slot widths for joinery work - the 2mm kerf and 12.7mm cutting depth are sized specifically for biscuit and spline joinery, meaning panels align correctly on the first fit without excessive gap-filling or sanding.
• Works across a broad material range - carbide-tipped (HW) construction handles solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic in a single tool, eliminating the need to swap cutters between material types on mixed-material projects.
• Scalable to your arbor setup - because this cutter is sold without an arbor, it can be stacked or paired with other CMT slot cutters on a shared CMT 824 series arbor, making it a cost-effective way to expand your slotting capability without purchasing complete assemblies each time.
• Designed for router, router table, and CNC use - the 8mm bore and right-hand rotation make this cutter compatible with a wide range of machine setups, from handheld routing to production CNC operations, without requiring adapter hardware.

Specifications

• Manufacturer Part Number: 822.320.11
• Brand: CMT Orange Tools
• Product Type: Slot Cutter
• Cutting Diameter: 1-7/8 in.
• Bore Diameter: 8mm
• Shank: 8mm
• Cutting Depth: 12.7mm
• Teeth Thickness: 2mm
• Plate Thickness: 0.051 in.
• Number of Teeth: 3
• Blade Material: HW (Carbide-Tipped / TCT)
• Rotation: Right-Hand (RH)
• Arbor: Not included (compatible with CMT 824 series arbors)

Approved Applications

• Biscuit slot cutting in solid wood and panel products
• Spline groove routing for edge-to-edge and miter joinery
• T-slot and H-slot cutting for connectors and hardware
• Panel joinery in solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic