CMT Two Flute Dowel Drill for Through Holes - 12x44x77mm Left-Hand Rotation is a precision-engineered boring tool built for clean, accurate through-hole drilling in panel processing and furniture manufacturing. Featuring a tungsten carbide (HW) cutting head and a super-strength steel body, this left-hand rotation drill is designed for use in multi-spindle boring machines and CNC boring centers where consistent hole quality across chipboard, MDF, hardwood, and coated panels is essential. The 12mm diameter, 44mm cutting height, and 77mm overall length make it well suited for drilling through-holes in thicker panels where standard-length dowel drills fall short.

Key Features

• HW (Tungsten Carbide) Cutting Head - delivers long-lasting edge retention and clean bore walls even in abrasive materials like chipboard and MDF, reducing tool change frequency and downtime.
• 2 Precision Ground Cutting Edges (Z2) - balanced chip load on both edges promotes smooth, vibration-free cutting and consistent hole geometry across every cycle.
• Precision Balanced Centre Point - ensures accurate hole placement from the very start of the cut, minimizing wander and improving positional accuracy in high-volume panel operations.
• 2 Spiral Flutes with PTFE Coating - the orange or black PTFE coating on the spiral portion prevents pitch and glue buildup, keeping the tool running cleanly and extending its working life.
• Left-Hand (LH) Rotation - correctly matched to left-hand spindle positions on multi-spindle boring machines, ensuring proper cutting geometry and surface finish on the entry face of the panel.
• Parallel Shank with Driving Flat and Length Adjusting Screw - the 10x26mm shank design allows secure seating in the spindle chuck, with the adjusting screw enabling precise depth and projection setting for repeatable results.
• 44mm Cutting Height on a 77mm Body - the extended reach allows through-hole boring in thicker panels where shorter dowel drills cannot complete the cut in a single pass.
• Super-Strength Steel Body - provides rigidity and resistance to deflection under load, supporting accurate hole positioning even at higher feed rates.

Why This Product

• The 77mm overall length and 44mm cutting height make this drill the right choice when working with thick panels that require a full through-hole - situations where a standard-length dowel drill would bottom out before completing the bore.
• Left-hand rotation is a specific machine requirement, not a preference - using the correct LH drill on a left-hand spindle ensures the cutting edges engage the material properly, producing clean entry faces and preventing tearout on coated or laminated panels.
• The PTFE-coated spiral flutes actively resist pitch and adhesive residue, making this drill a practical choice for production environments where panels with glue lines or resin-saturated materials are processed regularly.
• With a precision balanced centre point and two ground cutting edges, this drill supports the tight hole tolerances required for dowel joinery - where even minor positional error can cause misalignment during panel assembly.

Specifications

• Manufacturer Part Number: 366.120.12
• Brand: CMT Orange Tools
• Diameter: 12mm
• Cutting Height: 44mm
• Total Length: 77mm
• Shank: 10x26mm
• Number of Flutes: 2
• Rotation: LH (Left-Hand)
• Blade Material: HW (Tungsten Carbide)
• Sharpening: Through holes 60
• Application Type: Through Hole Dowel Drill

Approved Applications

• Drilling through-holes for dowel connections in furniture panels
• Panel processing on multi-spindle CNC boring machines
• Through-hole boring on CNC boring centers and panel processing centers
• Boring operations in solid wood, chipboard, MDF, HDF, plywood, laminates, and coated panels