CMT Dowel Drill for Through Holes - 5/32" x 30 x 70mm Left-Hand Rotation is a precision-engineered 2-flute boring tool designed for clean, accurate through-hole drilling in panels up to 30mm thick. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this left-hand rotation drill is purpose-built for high-volume furniture manufacturing, panel processing, and dowel joinery on multi-spindle CNC boring machines and panel processing centers. The PTFE-coated spiral flutes reduce friction and resist pitch and adhesive buildup, keeping the tool running cleanly across repeated production cycles.

Key Features

• HW (Tungsten Carbide) Cutting Head with Precision-Balanced Centre Point - delivers accurate hole entry and consistent bore alignment, reducing wandering and producing repeatable results across high-volume production runs.
• 2 Precision-Ground Cutting Edges (Z2) - two spiral flutes with precision-ground geometry create clean bore walls through solid wood, chipboard, MDF, and laminates, minimizing tearout on panel exit.
• PTFE-Coated Spiral Portion - the orange or black PTFE coating on the spiral prevents resin, glue, and pitch from adhering to the flutes, extending tool life and reducing downtime for cleaning between operations.
• Super-Strength Steel Body - the robust steel construction withstands the demands of continuous industrial boring, providing a stable foundation for the carbide cutting head.
• Parallel Shank with Driving Flat and Length-Adjusting Screw - the 10 x 26mm shank with driving flat ensures positive torque transfer in machine spindle chucks, while the length-adjusting screw allows precise depth setting without additional fixturing.
• Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines, ensuring proper chip evacuation direction and clean hole formation on the correct side of the panel.
• 30mm Cutting Height in a 70mm Overall Length - the long-series format accommodates full through-hole boring in panels up to 30mm thick, covering standard furniture panel dimensions in a single pass.

Why This Product

• The left-hand rotation configuration fills a specific need on multi-spindle CNC boring centers where spindles are assigned fixed rotation directions - using the correct drill orientation ensures clean chip evacuation and reduces the risk of surface tearout on panel faces.
• The HW (tungsten carbide) head paired with a PTFE-coated spiral directly addresses two of the most common through-hole drilling problems: tip wear from abrasive panel materials and flute clogging from adhesives, both of which shorten tool life and reduce hole quality.
• The 5/32" (4mm) diameter and 30mm cutting height match standard dowel connection dimensions used in flat-pack and knock-down furniture construction, making this drill a direct fit for production lines processing chipboard, MDF, and coated panels.
• The precision-balanced centre point and 2 precision-ground cutting edges work together to produce consistent, accurately positioned holes in every panel - critical in furniture manufacturing where dowel hole alignment determines assembly quality.

Specifications

• Manufacturer Part Number: 314.040.12
• Brand: CMT Orange Tools
• Diameter: 4mm (5/32")
• Cutting Height: 30mm
• Total Length: 70mm
• Shank: 10 x 26mm
• Number of Flutes: 2
• Blade Material: HW (Tungsten Carbide)
• Rotation: LH (Left-Hand)
• Sharpening: Through holes 60

Approved Applications

• Drilling through holes for dowel connections in flat-pack and knock-down furniture
• Panel processing on multi-spindle CNC boring machines
• CNC boring center operations requiring left-hand spindle tooling
• Through-hole boring in panels up to 30mm thick
• Boring centers equipped with adapters or chucks accepting a 10 x 26mm parallel shank