CMT 307.050.12 Dowel Drill - 5 x 40 x 67mm Left-Hand Rotation by CMT is a precision-engineered left-hand (LH) rotating boring tool designed for blind hole drilling in solid wood, chipboard, MDF, laminates, and coated panels. Built with a hardmetal (HW) tipped head on a super-strength steel body, this 5mm diameter dowel drill delivers clean, flat-bottom bores critical for accurate dowel joinery in furniture manufacturing and cabinet making. With a cutting height of 40mm and a compact 67mm overall length, it is well suited for multi-spindle boring machines and CNC panel processing centers that demand consistent, repeatable hole quality.

Key Features

• Hardmetal (HW) Cutting Head on Super-Strength Steel Body - the tungsten carbide tip bonded to a robust steel shank withstands the demands of high-cycle production boring, maintaining edge integrity over extended use in abrasive sheet materials such as chipboard and MDF.
• 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide cutting edges reduce cutting forces per edge, producing smooth, consistent bore walls and flat-bottom holes ideal for tight-tolerance dowel connections.
• 2 Negatively Ground Spurs (V2) - the negative grind geometry on both spurs scores the panel face cleanly before the cutting edges remove material, preventing tearout and chipout on veneered, laminated, and coated surfaces.
• Precision Balanced Centre Point - the hardmetal centre point locates the bore accurately before engagement, reducing wandering and ensuring hole-to-hole positioning accuracy across multi-spindle operations.
• Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring the cutting geometry works correctly and does not lift or mar the panel surface.
• 8 x 20mm Parallel Shank - the standardized shank dimension provides a secure, repeatable grip in boring machine chucks and collet adapters, minimizing runout and vibration during production runs.

Why This Product

• The negatively ground spurs combined with precision-ground HW cutting edges make this drill a strong choice for laminated and coated panel work where surface quality at the bore entry is critical to finished furniture appearance.
• The left-hand rotation designation is specifically engineered for LH spindle positions - using a correctly handed drill eliminates the risk of poor cut geometry, rough bore walls, or panel lifting that results from using an incorrectly oriented tool.
• At 5mm diameter with a 40mm cutting height, this tool is dimensionally matched to standard furniture dowel stock, making it a direct fit for high-volume dowel joint production in cabinet and panel processing workflows.
• The 8 x 20mm parallel shank is a widely accepted standard across multi-spindle CNC boring machines and boring centers, so this drill integrates into existing tooling setups without the need for special adapters.

Specifications

• Manufacturer Part Number: 307.050.12
• Diameter: 5mm
• Cutting Height: 40mm
• Total Length: 67mm
• Shank: 8 x 20mm
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2
• Number of Spurs: 2
• Spur Sharpening: Negatively ground spurs
• Blade Material: Hardmetal (HW)
• Brand: CMT Orange Tools

Approved Applications

• Blind hole drilling for dowel connections
• Panel drilling in furniture manufacturing
• Cabinet making and casework production
• Boring in solid hardwood and softwood
• Boring in chipboard and particleboard
• Boring in MDF and HDF
• Boring in plywood
• Boring in laminates and coated panels