CMT 309.095.12 Dowel Drill - 3/8 in. Diameter, Left-Hand Rotation, 2 Spurs, 43mm Cutting Height, 70mm Overall Length by CMT is a precision-engineered carbide-tipped boring tool built for furniture manufacturing, cabinet making, and panel processing applications. With a left-hand (LH) rotation and four spiral flutes, this dowel drill is optimized for use in multi-spindle CNC boring machines and industrial boring centers where clean, flat-bottom blind holes are required in solid wood, chipboard, MDF, and laminated panel stock. The 70mm total length accommodates deeper reach requirements, making it well suited for thicker panel construction and dowel joinery work demanding consistent bore quality across production runs.

Key Features

• HW (Tungsten Carbide) Cutting Head - hard-wearing carbide construction maintains a sharp cutting edge through demanding production volumes in chipboard, MDF, hardwood, and laminates, reducing retooling frequency and downtime.
• Precision-Balanced Centre Point - the HW centre point starts the bore accurately and keeps the drill on location without wandering, resulting in precise hole placement for tight dowel fitment.
• 2 Precision-Ground Cutting Edges (Z2) - dual carbide cutting edges deliver a clean, flat-bottomed blind hole and smooth bore walls, minimizing the need for secondary cleanup in finished panel work.
• 2 Negatively Ground Spurs (V2) - negatively sharpened spurs score the perimeter of the hole cleanly before the main cutters engage, preventing tearout and delamination on coated or laminated surfaces.
• 4 Spiral Flutes - four flutes efficiently evacuate chips and dust from the bore during drilling, reducing heat buildup and keeping the cutting zone clear for consistent hole quality.
• PTFE-Coated Cutter Portion - the black or orange PTFE coating on the cutter body resists pitch and adhesive buildup, extending the service life of the bit and maintaining smooth operation in resinous or glued materials.
• Super-Strength Steel Body - the steel shank and body resist flex and deflection even at extended reach, preserving bore straightness throughout the 70mm tool length.
• Parallel Shank with Driving Flat and Length-Adjusting Screw (10x20mm) - the flat-sided shank seats securely in the spindle chuck without slipping, and the adjusting screw allows precise depth setting, critical for repeatable blind-hole drilling in production environments.
• Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring proper cutting geometry and surface finish when installed in the correct spindle orientation.

Why This Product

• The 70mm total length combined with a 43mm cutting height gives this drill the reach needed for thicker panel stock and deeper blind holes, addressing applications where standard-length dowel drills fall short.
• The combination of negatively ground spurs and precision-ground carbide cutting edges makes this bit particularly effective on laminated and coated panels where tearout at the bore perimeter would compromise the finished appearance of cabinet and furniture components.
• Left-hand rotation is a deliberate specification, not a generic option - this drill is purpose-built for LH spindle positions on multi-spindle boring equipment, ensuring correct cutting action and surface quality on machines that require it.
• The PTFE cutter coating paired with four spiral flutes addresses two of the most common causes of premature bit wear - adhesive/pitch buildup and poor chip evacuation - supporting longer intervals between tool changes in high-throughput panel processing environments.

Specifications

• Manufacturer Part Number: 309.095.12
• Brand: CMT Orange Tools
• Product Type: Dowel Drill
• Diameter: 3/8 in.
• 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
• Number of Spurs: 2
• Spur Sharpening: Negatively ground spurs
• Blade Material: HW (Tungsten Carbide)
• Rotation: Left-Hand (LH)
• Coating: Black or orange PTFE on cutter portion

Approved Applications

• Blind hole drilling for dowel joinery connections
• Panel drilling in furniture manufacturing
• Cabinet carcass and component boring
• Chipboard and particleboard panel processing
• MDF and HDF boring
• Solid hardwood and softwood dowel hole drilling
• Plywood and coated panel drilling
• Laminate-faced and veneer panel boring