CMT Four Flute Dowel Drill - 5/16" x 50 x 85mm Right-Hand by CMT is a precision-engineered boring tool built for clean, accurate dowel holes in furniture manufacturing, cabinet making, and panel processing applications. Combining a tungsten carbide (HW) cutting head with a super-strength steel body and a PTFE-coated spiral, this long-series dowel drill delivers fast chip evacuation and consistent hole quality in solid wood, chipboard, MDF, and laminates alike.

Key Features

• Tungsten Carbide (HW) Cutting Head with Precision-Balanced Centre Point - delivers accurate hole placement on contact, reducing workpiece shift and ensuring every dowel hole is drilled exactly on center for tight, reliable joinery.
• 2 Precision-Ground HW Cutting Edges (Z2) - carbide-tipped edges hold a sharp cutting profile longer than high-speed steel alternatives, reducing downtime for resharpening during high-volume production runs.
• 2 Negatively Ground Spurs (V2) - score the material cleanly before the main cutters engage, producing flat-bottomed holes with clean walls and minimal tearout on coated panels and laminates.
• 4 Spiral Flutes - double the chip evacuation pathways compared to a standard 2-flute design, keeping the bore clear and reducing heat buildup during deep blind hole drilling.
• PTFE Coating on the Cutter Portion - the black or orange PTFE coating prevents pitch and adhesive residue from bonding to the flutes, extending tool life and reducing cleaning time between operations.
• Parallel Shank with Driving Flat and Length Adjustment (10 x 27mm) - the driving flat provides a secure, non-slip grip in multi-spindle CNC boring machines and boring centers, while the length-adjusting feature allows precise depth setting.
• Long-Series Design at 85mm Overall Length with 50mm Cutting Height - provides the reach needed for deep blind holes in thick panels without sacrificing rigidity or concentricity.
• Right-Hand (RH) Rotation - compatible with standard right-hand spindle configurations on multi-spindle CNC boring machines and panel processing centers.

Why This Product

• The 4-flute design is specifically suited to high-throughput panel drilling where fast chip evacuation matters - in production cabinet and furniture shops, slower chip removal causes heat buildup that dulls tools and degrades hole quality in MDF and chipboard.
• The combination of negatively ground spurs and a precision-balanced HW centre point means the drill enters cleanly on both coated and uncoated surfaces, making it a reliable choice for panels with decorative laminates where tearout is unacceptable.
• At 85mm total length with a 50mm cutting height, this long-series dowel drill reaches blind-hole depths that standard short-series drills cannot achieve without repositioning, which is a practical advantage when drilling thick cabinet sides or solid wood blanks.
• The PTFE-coated spiral works directly against pitch and glue accumulation - a common problem when boring MDF and pre-glued chipboard panels - helping maintain consistent cutting performance across long production runs without frequent tool cleaning.

Specifications

• Manufacturer Part Number: 373.080.11
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 50mm
• Total Length: 85mm
• Shank: 10 x 27mm
• Number of Flutes: 4
• Number of Cutting Edges: 2 (Z2)
• Number of Spurs: 2 (V2)
• Spur Grind: Negatively ground spurs
• Blade Material: HW (Tungsten Carbide)
• Rotation: Right-Hand (RH)

Approved Applications

• Drilling blind holes for dowel connections in furniture and cabinet assembly
• Panel drilling in chipboard, MDF, HDF, and coated panels
• Boring in solid hardwood and softwood
• Drilling plywood and laminate panels
• Production cabinet making and furniture manufacturing
• Use in multi-spindle CNC boring machines
• Use in CNC boring centers and panel processing centers
• Use in boring machines with an appropriate adapter or chuck