CMT 309.040.11 Dowel Drill - 5/32" x 30 x 70mm Right-Hand by CMT is a precision-engineered 4-flute boring tool built for clean, accurate dowel holes in panel processing, cabinet making, and furniture manufacturing. With a 4mm cutting diameter, a 43mm cutting height, and a 70mm overall length, this long-series drill is designed to reach the depth needed for blind holes in thicker panel stock - including solid wood, MDF, chipboard, and laminated surfaces. The carbide-tipped (HW) cutting head, PTFE-coated spiral flutes, and negatively ground spurs work together to deliver flat-bottomed, chip-free bores that seat dowels cleanly and consistently.

Key Features

• HW (tungsten carbide) precision-ground cutting head - delivers long-lasting edge retention even in abrasive materials like MDF and chipboard, reducing sharpening frequency and downtime.
• 2 negatively ground spurs (V2) - slice the wood fibers ahead of the cutting edge to produce clean, tear-free bore walls and sharp hole perimeters with no splintering or rough edges.
• 2 precision-ground carbide cutting edges (Z2) - maintain a flat-bottomed hole geometry essential for proper dowel seating and flush joint alignment in panel assembly.
• 4 spiral flutes - evacuate chips efficiently from the bore, preventing heat buildup and re-cutting of debris that can degrade hole quality in high-volume production runs.
• PTFE coating on cutter portion - resists pitch and glue buildup on the flute surfaces, keeping the tool running cleanly in coated panels and resin-rich materials without frequent cleaning.
• Super-strength steel body - provides rigidity and vibration damping under the carbide head, supporting consistent hole depth and bore accuracy across repeated drilling cycles.
• Parallel shank (10x20mm) with driving flat and length-adjusting screw - enables secure, repeatable tool registration in multi-spindle CNC boring machines and boring centers, minimizing runout and setup variation.
• Right-hand (RH) rotation - compatible with standard right-hand spindles on multi-spindle boring machines and CNC boring centers used in panel processing and furniture production.
• 70mm overall length (long series) - provides the reach required for deeper blind holes in thicker panels, expanding the range of workpieces this drill can handle compared to standard-length versions.

Why This Product

• The 43mm cutting height combined with the 70mm long-series body gives furniture and cabinet makers the depth capacity to bore clean blind holes in thicker panel stock where standard-length dowel drills fall short.
• The combination of negatively ground spurs and a precision-balanced HW centre point produces hole walls and bottoms clean enough for tight-fitting dowel joints - critical in high-volume furniture and cabinetry assembly where rework is costly.
• The PTFE-coated spiral and carbide cutting geometry make this drill suitable for MDF, chipboard, laminates, hardwood, and softwood - a single tool that handles the full range of materials common in panel processing without changing tool sets.
• The 10x20mm parallel shank with driving flat and length-adjusting screw is engineered specifically for multi-spindle CNC boring machines and panel processing centers, ensuring a precise, locked-in fit that maintains repeatable hole positioning across production runs.

Specifications

• Manufacturer Part Number: 309.040.11
• Brand: CMT Orange Tools
• Diameter: 4mm (5/32")
• Cutting Height: 43mm
• Total Length: 70mm
• Shank: 10x20mm (parallel shank with driving flat and length-adjusting screw)
• Number of Flutes: 4
• Number of Cutting Edges: 2 (Z2)
• Number of Spurs: 2 (V2)
• Spur Sharpening: Negatively ground spurs
• Blade Material: HW (tungsten carbide)
• Rotation: Right-hand (RH)
• Product Type: 4 Flute Dowel Drill
• Series: Long Series (70mm)

Approved Applications

• Drilling blind holes for dowel connections in panel assemblies
• Furniture manufacturing and cabinet making
• Panel drilling in solid wood, chipboard, MDF, HDF, plywood, laminates, and coated panels
• Use in multi-spindle CNC boring machines and panel processing centers
• Use in CNC boring centers and boring machines equipped with an adapter or chuck