CMT Slot Cutter 1-7/8" x 3/16" with 1/4" Shank - 3 Tooth (822.348.11A) is a precision-engineered, three-wing slot cutter from CMT designed to cut clean, accurate slots and grooves in a wide range of wood and composite materials. Whether you are routing spline grooves, biscuit slots, T-molding channels, or tongue and groove joinery, this carbide-tipped blade delivers consistent results across solid hardwood, softwood, plywood, MDF, laminates, and melamine. The blade is sold separately and pairs with CMT 824-series arbors that include a 22mm (7/8") diameter bearing for a controlled cutting depth of up to 12.7mm (1/2").

Key Features

• Anti-Kickback Design - limits the amount of material each tooth can engage per pass, reducing the risk of sudden, dangerous kickback during routing and giving the operator greater control at the router table or with a handheld router.
• Micrograin Carbide Tips (HW Material) - the dense, fine-grain carbide composition holds a sharper edge longer than standard carbide, meaning fewer sharpenings, cleaner slot walls, and extended cutting life across hardwoods and engineered materials alike.
• CMT Orange Shield Non-Stick PTFE Coating - the trademark orange PTFE coating prevents heat buildup, reduces pitch and resin adhesion on the blade body, and guards against corrosion, keeping the cutter performing at full efficiency and extending its usable lifespan.
• 3-Wing (3 Tooth) Configuration - three evenly spaced cutting edges provide a balanced cut with reduced vibration, resulting in smoother slot surfaces and more consistent groove width on every pass.
• 3/16" Teeth Thickness - matches common spline and biscuit slot requirements right out of the box, eliminating the need for multiple passes or additional setup to achieve the correct groove width.
• 1/4" Shank Diameter - fits a wide range of compact and standard routers with 1/4" collets, making this cutter compatible with handheld routers, router tables, and CNC routing machines already in many shops.
• Right-Hand Rotation (RH) - conforms to the standard direction of virtually all router collets, ensuring correct cutting geometry and predictable chip ejection without any special setup.
• Near-Infinite Application Range - the versatility of this slot cutter for splines, biscuits, T-molding, and tongue and groove joints means one blade handles multiple joinery tasks across a wide variety of woodworking and cabinetry projects.

Why This Product

• For woodworkers and cabinet makers who need accurate, repeatable groove joints - whether for biscuit joinery, spline alignment, or T-molding installation - this three-wing design delivers consistent slot width and depth in a single pass without rework.
• The 0.114" plate thickness and 3/16" cutting thickness are precision-matched to standard slot joinery dimensions, eliminating guesswork and the need for custom shimming when working on panel and frame assemblies.
• The combination of micrograin carbide tips and anti-kickback geometry makes this cutter a practical choice for both production environments and job-site use, where operator safety and tool longevity are equally important.
• Because the blade is sold separately from the arbor, it can be swapped onto existing CMT 824-series arbor setups to change slot widths without replacing the entire assembly - a cost-efficient approach for shops that cut multiple groove profiles.

Specifications

• Manufacturer Part Number: 822.348.11A
• Brand: CMT Orange Tools
• Diameter: 1-7/8"
• Cutting Depth: 12.7mm
• Teeth Thickness: 3/16"
• Plate Thickness: 0.114"
• Total Length: 2-13/32"
• Shank: 1/4"
• Number of Teeth: 3
• Blade Material: HW (Micrograin Carbide)
• Rotation: Right-Hand (RH)
• Product Type: Slot Cutter

Approved Applications

• Spline groove routing
• Biscuit slot cutting (use with 4mm / 5/32" cutting length for biscuit joints)
• T-molding channel cutting
• Tongue and groove joint routing
• Panel joinery in solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic
• Handheld router, router table, and CNC routing machine use