The CMT Four Flute Dowel Drill - 10 x 50 x 85mm Left-Hand Rotation by CMT is an industrial-grade boring tool engineered for precision dowel hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built on a super-strength steel body with a tungsten carbide (HW) head, this left-hand dowel drill delivers clean, flat-bottom blind holes in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels. Four spiral flutes accelerate chip evacuation for efficient material removal, while a PTFE-coated cutter portion resists pitch and adhesive buildup - keeping the tool running cleanly through high-volume production cycles.

Key Features

• HW (Tungsten Carbide) Cutting Head on Super-Strength Steel Body - combines carbide hardness with a tough steel core, resulting in a tool that maintains sharp cutting edges under continuous industrial use and resists wear in abrasive materials like MDF and chipboard.
• 2 Precision-Ground Cutting Edges (Z2) - each edge is ground to exacting tolerances so every bore is dimensionally consistent, which is critical when fitting dowels with tight tolerances in furniture and cabinet assembly.
• 2 Negatively Ground Spurs (V2) - negatively ground geometry scribes the perimeter of the hole before material is removed, producing clean bore walls and tear-out-free entry points on laminates and coated panel surfaces.
• 4 Spiral Flutes - four flutes versus a standard two-flute design means faster chip evacuation from the cutting zone, reducing heat buildup and allowing for faster feed rates in deep blind hole drilling.
• PTFE Non-Stick Coating on the Cutter Portion - the black or orange PTFE coating prevents pitch, resin, and glue from adhering to the spiral, extending tool life and reducing cleaning downtime in production environments.
• Precision-Balanced Centre Point - the HW centre point is precision balanced to locate accurately at the start of the bore, eliminating drill walk and ensuring hole placement accuracy on CNC boring centres and multi-spindle machines.
• Parallel Shank with Driving Flat and Length-Adjusting Feature - the 10 x 27mm parallel shank seats securely in boring machine collets and chucks, and the driving flat prevents shank rotation under load while the length-adjusting capability allows the tool to be set to exact depth requirements.
• Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle CNC boring machines and panel processing centres, ensuring the correct cutting geometry engages the material rather than rubbing against it.

Why This Product

• Engineered for left-hand spindle positions - many multi-spindle CNC boring machines and boring centres require left-hand rotation tools for specific spindle locations. Using the correct LH rotation drill ensures the cutting edges engage the workpiece properly, producing clean holes rather than burnished or torn bores.
• Four-flute design for deeper, cleaner blind holes - when drilling dowel holes in panel materials like chipboard, MDF, or laminates, chip evacuation is the limiting factor for speed and hole quality. The four-flute configuration clears chips more aggressively than two-flute alternatives, supporting faster cycle times without sacrificing bore quality.
• PTFE coating extends tool life in adhesive-heavy environments - furniture and cabinet production often involves pre-glued dowels or panels with adhesive coatings. The PTFE-coated spiral resists buildup so the tool stays sharp and free-running longer between sharpening or replacement intervals.
• Negatively ground spurs protect face laminate and coated surfaces - surface tearout at the entry point of a dowel hole is a common quality defect on coated panels and laminates. The negatively ground spur geometry scribes a clean circle before cutting begins, protecting the surface finish and reducing reject rates.

Specifications

• Manufacturer Part Number: 373.100.12
• Brand: CMT Orange Tools
• Diameter: 10mm
• Cutting Height: 50mm
• Total Length: 85mm
• Shank: 10 x 27mm (parallel shank with driving flat and length adjusting)
• Number of Flutes: 4
• Number of Cutting Edges: 2 (Z2)
• Number of Spurs: 2 (V2)
• Spur Sharpening: Negatively ground spurs
• Blade Material: HW (Tungsten Carbide)
• Rotation: Left-Hand (LH)
• Cutter Coating: Black or orange PTFE
• Series: Long Series (85mm)

Approved Applications

• Drilling blind dowel holes in solid wood (hardwood and softwood)
• Boring dowel holes in chipboard and particle board panels
• Panel drilling in MDF and HDF
• Dowel boring in plywood and laminates
• Blind hole drilling in coated panels
• Furniture manufacturing and cabinet making production lines
• CNC boring centres and multi-spindle boring machine operations
• Panel processing centre applications requiring left-hand spindle tools