CMT 310.070.12 Dowel Drill - 7 x 27 x 57.5mm Left-Hand Rotation is a precision-engineered, carbide-tipped boring tool built for clean blind-hole drilling in furniture panels, cabinetry components, and sheet goods. Designed by CMT for multi-spindle CNC boring machines and panel processing centers, this short-series dowel drill delivers consistent, flat-bottom bores for tight-tolerance dowel joinery in production woodworking environments. The left-hand rotation design integrates directly into dedicated LH spindle positions, making it a reliable workhorse for high-volume panel drilling operations.

Key Features

• HW (Tungsten Carbide) Cutting Head with 2 Precision Ground Cutting Edges (Z2) - carbide hardness extends edge life across abrasive materials like chipboard, MDF, HDF, and coated panels, reducing downtime between tool changes in production settings.
• 2 Negatively Ground Spurs (V2) - the negative grind geometry scores the material cleanly ahead of the cutting edges, producing smooth bore walls and crisp, tearout-free entry points - critical for visible dowel holes in finished furniture panels.
• PTFE-Coated Spiral Flutes - the orange or black PTFE coating on the spiral portion prevents pitch, resin, and adhesive from accumulating in the flutes, keeping chips evacuating freely and reducing heat buildup during continuous boring cycles.
• Precision Balanced Centre Point - the HW centre point self-locates accurately on the panel surface, ensuring hole position repeatability across high-cycle CNC boring runs without drift or wandering.
• Parallel Shank with Driving Flat and Length Adjusting Screw - 10 x 27mm - the driving flat prevents shank rotation in the spindle chuck, while the adjusting screw allows precise depth-of-drill setting, ensuring consistent blind hole depth across all spindle positions.
• Super-Strength Steel Body - the high-grade steel shank and spiral body resist flexing and fatigue under the repetitive load cycles typical of automated multi-spindle boring machines, maintaining concentricity over the tool's service life.
• Left-Hand (LH) Rotation - purpose-built for LH spindle stations on multi-spindle boring heads, allowing simultaneous RH and LH drilling without repositioning or reversing feed direction.

Why This Product

• The 7mm diameter is one of the most widely used dowel bore sizes in furniture and cabinet manufacturing - this short-series (57.5mm overall length) format fits directly into standard multi-spindle boring heads without spacer adapters.
• The combination of negatively ground spurs and a precision HW centre point produces flat-bottom blind holes with clean walls in a single pass, reducing sanding or rework on visible panel faces.
• PTFE coating on the spiral means the bit resists pitch and glue buildup that would otherwise cause overheating and premature edge failure - particularly valuable in high-cycle production runs on melamine-coated and laminated panels.
• Left-hand rotation with a driving flat shank ensures secure, slip-free engagement in LH spindle positions, making this drill a direct, confident match for CNC boring centers that require both RH and LH tooling simultaneously.

Specifications

• Manufacturer Part Number: 310.070.12
• Brand: CMT Orange Tools
• Tool Type: Dowel Drill
• Diameter: 7mm
• Cutting Height: 27mm
• Total Length: 57.5mm
• Shank: 10 x 27mm parallel shank with driving flat and length adjusting screw
• Number of Flutes: 2
• Number of Spurs: 2
• Spur Sharpening: Negatively ground spurs
• Number of Cutting Edges: 2
• Blade Material: HW (Tungsten Carbide)
• Rotation: Left-Hand (LH)
• PTFE Coating: Yes - spiral portion coated with orange or black P.T.F.E.

Approved Applications

• Blind hole drilling for dowel connections in solid wood and engineered wood panels
• Panel drilling in chipboard, MDF, and HDF
• Boring in hardwood and softwood components
• Drilling in laminates, coated panels, and plywood
• Furniture manufacturing and cabinet making production lines
• CNC boring center and multi-spindle boring machine operations