CMT 309.090.12 Dowel Drill 9 x 43 x 70mm LH is a left-hand rotation, 4-flute carbide-tipped boring tool engineered for precision dowel hole drilling in furniture manufacturing, cabinetmaking, and panel processing. Built around a tungsten carbide (HW) cutting head mounted on a super-strength steel body, this long-series drill delivers flat-bottom blind holes with clean, tear-free walls in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels. The 70mm overall length accommodates deeper boring depths where standard-length drills fall short, making it a reliable choice for thicker panel stock and multi-spindle CNC boring operations.

Key Features

• Tungsten carbide (HW) cutting head on super-strength steel body - delivers long-lasting edge retention and resistance to the abrasive materials found in MDF, chipboard, and coated panels, reducing downtime for tool changes.
• 2 precision-ground cutting edges (Z2) - balanced load distribution during boring produces consistent hole geometry and a flat bottom, which is critical for tight-fitting dowel connections.
• 2 negatively ground spurs (V2) - shear the panel surface fibers ahead of the cutting edges, preventing tearout and leaving clean bore walls on both laminates and solid wood faces.
• 4 spiral flutes - actively evacuate chips and dust from the bore during drilling, reducing heat buildup and keeping the cutting zone clear for a cleaner finished hole.
• PTFE coating on the cutter portion (black or orange) - acts as a non-stick barrier against pitch, resin, and glue residue so the tool stays cleaner longer and maintains cutting performance between sharpenings.
• Precision-balanced centre point - registers accurately on the panel surface before the spurs engage, preventing drill walk and ensuring repeatable hole placement across high-volume production runs.
• 10 x 20mm parallel shank with driving flat and length-adjusting screw - provides secure, slip-free seating in multi-spindle CNC boring machines, boring centers, and panel processing equipment, with on-tool depth adjustment for fast setup.
• Left-hand (LH) rotation - designed specifically for left-hand spindle positions on multi-spindle boring heads, enabling simultaneous bilateral drilling without repositioning the workpiece.
• Long-series 70mm overall length with 43mm cutting height - reaches deeper blind-hole depths than standard-series drills, making it suitable for thicker panel stock and applications where extra depth capacity is required.

Why This Product

• The left-hand rotation is a dedicated specification - not an adapter workaround - so this drill integrates directly into left-hand spindle positions on multi-spindle CNC boring heads, allowing paired right-hand and left-hand drills to work simultaneously for maximum throughput.
• The combination of negatively ground spurs and a precision-balanced centre point means hole quality stays consistent across long production runs, reducing rejects and rework in furniture manufacturing and cabinetmaking operations.
• At 70mm overall length with a 43mm cutting height, this long-series drill handles the deeper blind holes that thicker panel stock demands - a geometry that standard-series dowel drills cannot reach without tool extension workarounds.
• The PTFE cutter coating and 4-flute chip-clearing design work together to extend service intervals - the coating repels pitch and glue while the flutes keep the bore clear, so the tool stays sharp and productive across a wider range of panel materials including laminates and coated panels.

Specifications

• Manufacturer Part Number: 309.090.12
• Brand: CMT Orange Tools
• Product Type: 4 Flute Dowel Drill
• Diameter: 9mm
• Cutting Height: 43mm
• Total Length: 70mm
• Shank: 10 x 20mm 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: Tungsten carbide (HW)
• Body Material: Super-strength steel
• Cutter Coating: Black or orange PTFE
• Rotation: Left-hand (LH)

Approved Applications

• Drilling blind holes for dowel connections in panel and solid wood assemblies
• Furniture manufacturing and cabinet production
• Panel drilling on chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
• Left-hand spindle positions on multi-spindle CNC boring machines and boring centers
• Panel processing centers requiring deeper blind-hole capacity
• Boring machines using adapter or chuck configurations