CMT 822.340.11B Slot Cutter by CMT is a precision-ground, three-wing router bit engineered to cut clean, accurate slots and grooves in a wide range of wood and wood-composite materials. Designed for use with a compatible CMT 824 series arbor, this carbide-tipped slot cutter is built for demanding joinery applications - from biscuit slot cutting and spline groove routing to T-molding installation and tongue-and-groove panel joinery. Its 1 7/8 in. diameter, 5/32 in. teeth thickness, and 1/2 in. shank make it a versatile choice for handheld routers, router tables, and CNC routing machines alike.

Key Features

• CMT Orange Shield Non-Stick PTFE Coating - reduces pitch and resin buildup on the cutter body, prevents overheating during extended cuts, protects against corrosion, and extends overall tool life between sharpenings.
• Micrograin Carbide Tips (HW material grade) - finer carbide grain structure delivers a sharper, longer-lasting cutting edge compared to standard carbide, resulting in smoother slot walls and reduced tearout in hardwood and composite materials.
• Anti-Kickback Design - limits the amount of material the bit can remove per pass, reducing the risk of sudden, dangerous kickback events and improving control during routing operations.
• Three-Wing (3-Tooth) Configuration - three evenly spaced cutting edges distribute the cutting load for balanced, vibration-free cuts and a consistently smooth groove finish in solid wood, plywood, MDF, and laminates.
• Right-Hand (RH) Rotation - standard direction compatible with the vast majority of handheld routers, router tables, and CNC routing machines, making this cutter a straightforward drop-in for most setups.
• 1/2 in. Shank Diameter - the larger 1/2 in. shank transfers power more efficiently than a 1/4 in. shank, reducing vibration and deflection for more accurate slot depth and placement.
• 12.7mm (1/2 in.) Cutting Depth Capability - when paired with a 22mm (7/8 in.) bearing arbor, this cutter achieves up to 12.7mm of cutting depth, giving woodworkers the reach needed for solid biscuit and spline joints.
• 5/32 in. Cutting Length - the correct width for standard biscuit joint slots, making this cutter the appropriate choice when cutting slots for biscuit joinery as noted in CMT specifications.

Why This Product

• Purpose-built for biscuit joinery - CMT specifies that a 4mm (5/32 in.) cutting length slot cutter is the correct choice for biscuit joints, and this cutter matches that spec exactly, removing guesswork from bit selection.
• Near-infinite joinery versatility - the same cutter handles spline grooves, T-molding slots, tongue-and-groove joints, and panel joinery, reducing the need for multiple specialized bits in a single workflow.
• Anti-kickback geometry and PTFE coating work together to make cuts safer and cleaner - the coating keeps the bit running cooler and cleaner while the anti-kickback design limits aggressive bites into the workpiece, both contributing to better surface quality and operator safety.
• Compatible with a full range of CMT 824 series arbors - this blade-only format allows woodworkers to pair it with the bearing size and arbor configuration that best suits their specific cutting depth and material thickness requirements.

Specifications

• Manufacturer Part Number: 822.340.11B
• Brand: CMT Orange Tools
• Product Type: Slot Cutter
• Diameter: 1 7/8 in.
• Cutting Depth: 12.7mm
• Teeth Thickness: 5/32 in.
• Plate Thickness: 0.083 in.
• Total Length: 2 21/32 in.
• Shank Diameter: 1/2 in.
• Number of Teeth: 3
• Blade Material: Micrograin Carbide (HW)
• Rotation: Right-Hand (RH)

Approved Applications

• Biscuit Slot Cutting
• Spline Groove Routing
• T-Molding Slot Cutting
• Tongue-and-Groove Joint Cutting
• Panel Joinery
• H-Slot and Cross-Slot Cutting