CMT 308.127.12 Dowel Drill - 1/2" x 1-3/16" x 2-17/64" Left-Hand Rotation by CMT is a precision-engineered carbide-tipped boring bit designed for clean, flat-bottom blind hole drilling in solid wood, chipboard, MDF, laminates, and coated panels. With a left-hand (LH) rotation and negatively ground spurs, this dowel drill is built for multi-spindle CNC boring machines, panel processing centers, and automated boring equipment where accuracy and surface quality are non-negotiable.

Key Features

• Tungsten Carbide (HW) Cutting Material - hard-wearing carbide construction maintains a sharp edge longer than high-speed steel alternatives, reducing downtime and replacement frequency in high-volume production environments.
• Negatively Ground Spurs (2 spurs) - precision-sharpened spurs score the perimeter of the hole before the main cutters engage, producing clean bore walls and splinter-free entry points with no tearout or rough edges.
• Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring correct chip evacuation and clean hole geometry on LH stations.
• 2-Flute / 2-Tooth Geometry - paired cutting edges deliver balanced chip removal and smooth bore surfaces in a single pass through chipboard, MDF, HDF, plywood, hardwood, softwood, and laminates.
• 10x20mm Parallel Shank with Driving Flat - standardized shank dimensions allow direct mounting in compatible boring machine spindles without adapters, providing secure tool retention and minimal runout.
• Short Series Profile (57.5mm Total Length) - compact overall length improves rigidity during drilling, reducing vibration and deflection for consistently accurate hole depth and diameter.
• 30mm Cutting Height - sufficient cutting depth for standard dowel joint applications in furniture and cabinet panel production, accommodating common dowel pin lengths in a single plunge.

Why This Product

• Left-hand spindle stations on multi-spindle boring machines require LH-rotation bits - using the wrong rotation causes poor hole quality and premature tool wear. This bit is purpose-built for LH stations, making it a direct, correct-specification replacement for production shop environments.
• The negatively ground spur design addresses one of the most common boring problems in panel processing - fiber tearout and rough hole edges - producing clean, ready-to-assemble bores in chipboard, MDF, laminates, and coated panels without secondary finishing.
• Carbide (HW) material handles the abrasive resins and adhesives found in engineered wood products like MDF and laminated chipboard far better than standard steel bits, giving production shops longer tool life between sharpenings and lower cost per hole.
• The standardized 10x20mm shank with driving flat is compatible with a wide range of boring machine spindles and CNC boring centers, making this bit a versatile fit for furniture manufacturers, cabinet shops, and panel processing facilities.

Specifications

• Manufacturer Part Number: 308.127.12
• Brand: CMT Orange Tools
• Product Type: Dowel Drill
• Diameter: 1/2"
• Cutting Height: 30mm (1-3/16")
• Total Length: 57.5mm (2-17/64")
• Shank: 10x20mm
• Rotation: Left-Hand (LH)
• Number of Spurs: 2
• Number of Teeth: 2
• Sharpening Type: Negatively ground spurs
• Blade Material: Carbide (HW)
• Series: Short Series

Approved Applications

• Chipboard and particle board panels
• MDF (medium-density fiberboard)
• HDF (high-density fiberboard)
• Hardwood
• Softwood
• Plywood
• Laminates
• Coated panels
• Blind hole drilling for dowel joinery
• Multi-spindle CNC boring machine operations
• CNC boring center panel processing
• Boring machines with compatible 10x20mm spindle