The CMT Dowel Drill for Through Holes - 1/2" x 35 x 70mm Left-Hand is a precision-engineered, carbide-tipped boring tool built for high-volume panel processing and furniture manufacturing. Designed specifically for drilling clean through-holes in chipboard, MDF, hardwood, softwood, and laminates, this left-hand rotation drill delivers consistent, blowout-free results on every pass. Its 2-flute spiral design, PTFE-coated body, and precision-balanced carbide centre point make it a reliable choice for CNC boring centres, multi-spindle boring machines, and panel processing equipment where accuracy and surface quality are non-negotiable.

Key Features

• HW (Tungsten Carbide) Cutting Head with Precision-Balanced Centre Point - the carbide tip maintains a sharp, centred entry point through demanding materials, reducing wander and producing consistently accurate hole placement across repeated cycles.
• 2 Precision-Ground Cutting Edges (Z2) - dual-flute geometry distributes cutting load evenly, resulting in smooth bore walls and cleaner through-hole exits that require little or no secondary finishing.
• Spiral Portion Coated with PTFE (Orange or Black) - the non-stick PTFE coating prevents pitch, resin, and adhesive buildup on the flutes, which extends tool life and maintains cutting performance between sharpenings.
• Super-Strength Steel Body - the robust steel shank and body absorb the stresses of continuous machine boring without flex or vibration, protecting both the tool and the workpiece surface.
• Parallel Shank with Driving Flat and Length-Adjusting Screw - the 10 x 26mm shank mounts securely in standard boring machine chucks and multi-spindle heads, with the adjusting screw allowing precise depth setting without re-chucking.
• Left-Hand Rotation (LH) - engineered for left-hand spindle positions on multi-spindle boring machines, ensuring correct chip evacuation and proper cutting geometry on LH stations.
• Through-Hole Geometry Rated for Sharpening at 60 deg. - the drill can be resharpened, making it a cost-effective long-term investment for shops running high production volumes.

Why This Product

• Built for through-hole dowel joinery - unlike general-purpose drill bits, this tool is specifically geometrised for clean through-holes in panel materials up to 35mm of cutting depth, making it the right choice when dowel connection quality directly affects furniture assembly strength and appearance.
• Correct rotation for LH spindle stations - multi-spindle boring machines require matched left-hand and right-hand drills for their respective spindle positions. Using this LH drill on an LH station ensures proper cutting action, clean chip removal, and reduced heat buildup.
• PTFE coating reduces downtime - in production environments where machines run continuously, the anti-stick spiral coating keeps the flutes clear of resin and glue residue, meaning fewer stoppages for cleaning and more consistent output per shift.
• Resharpenable carbide construction - the HW carbide head and 60 deg. sharpening specification mean the drill can be reconditioned rather than discarded, lowering the cost per hole over the working life of the tool.

Specifications

• Manufacturer Part Number: 314.127.12
• Brand: CMT Orange Tools
• Diameter: 1/2"
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 26mm (parallel shank with driving flat)
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2
• Blade Material: HW (Tungsten Carbide)
• Sharpening Specification: Through holes, 60 deg.

Approved Applications

• Drilling through-holes for dowel connections in panel furniture
• Panel processing on CNC boring centres and multi-spindle machines
• Through-hole boring in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
• High-volume furniture manufacturing requiring repeatable hole accuracy