The CMT Slot Cutter 1-7/8" x 5/64" is a precision-engineered three-wing carbide-tipped router bit designed for cutting clean, accurate slots and grooves in a wide range of woodworking and joinery applications. Built with CMT's micrograin carbide tips, anti-kickback geometry, and the brand's signature orange non-stick PTFE coating, this slot cutter delivers consistent performance when routing biscuit slots, spline grooves, T-molding channels, and tongue-and-groove joints. Compatible with CMT 824 series arbors and equipped with a 1/2 in. shank, it pairs with a 22mm (7/8 in.) bearing for guided, repeatable cuts up to 12.7mm deep.

Key Features

• Micrograin Carbide Tips (HW Material) - a denser, harder carbide formulation that holds a sharp edge longer, reducing the frequency of resharpening and extending the working life of the cutter through demanding production use.
• Anti-Kickback Design - limits the amount of material the bit can remove in a single pass, reducing the risk of sudden tool grab and improving operator control and worksite safety.
• CMT Orange Non-Stick PTFE Coating - prevents pitch and resin buildup on the blade surface, reduces heat during cutting, guards against corrosion, and keeps the bit performing cleanly cut after cut.
• Three-Wing (3-Tooth) Configuration - three evenly spaced carbide wings produce a smoother slot finish compared to single- or double-flute designs, resulting in cleaner joint surfaces and better-fitting splines or biscuits.
• 1/2 in. Shank - the larger shank diameter minimizes vibration and deflection during routing, improving slot accuracy and surface quality, particularly in deeper passes.
• Right-Hand Rotation - standard RH rotation ensures compatibility with the vast majority of handheld routers, router tables, and CNC routing machines.
• 0.051 in. Plate Thickness / 5/64 in. Teeth Thickness - precisely calibrated blade dimensions produce slots sized for standard biscuits, splines, and T-molding without additional setup or adjustment.
• 1-7/8 in. Cutting Diameter - provides a sufficient cutting arc for both edge-to-edge panel joinery and face-frame slotting with a single cutter setup.

Why This Product

• The anti-kickback body design combined with the three-wing carbide configuration makes this cutter a reliable choice for woodworkers who need repeatable, controlled slot depths across multiple workpieces without constant tool changes.
• With a 12.7mm cutting depth and compatibility with CMT 824 series arbors featuring a 22mm bearing, this bit covers the full range of common horizontal slot joinery tasks - from biscuit-joint assembly to T-molding installation - using a single, versatile setup.
• The PTFE non-stick coating directly addresses one of the most common issues with slot cutters: resin and pitch accumulation that degrades cut quality. This keeps the blade running cleaner between cleanings and extends the interval between re-sharpenings.
• The 1/2 in. shank size makes this cutter suitable for use in professional-grade routers and router tables where reduced runout and chatter are critical for achieving tight-fitting panel joints in hardwood, plywood, MDF, and composite materials.

Specifications

• Manufacturer Part Number: 822.320.11B
• Brand: CMT Orange Tools
• Diameter: 1-7/8 in.
• Cutting Depth: 12.7mm
• Teeth Thickness: 5/64 in.
• Plate Thickness: 0.051 in.
• Total Length: 2-21/32 in.
• Shank: 1/2 in.
• Number of Teeth: 3
• Rotation: Right-Hand (RH)
• Blade Material: Micrograin Carbide (HW)
• Product Type: Slot Cutter

Approved Applications

• Biscuit slot cutting for panel and frame joinery
• Spline groove routing for edge-to-edge glue-ups
• T-molding channel cutting
• Tongue and groove joint routing
• Horizontal slot cutting in solid hardwood and softwood
• Slot routing in plywood, MDF, chipboard, and laminates
• Melamine and plastic panel joinery