Product Description
CMT Two Flute Dowel Drill for Through Holes - 6x44x77mm Left-Hand Rotation is a precision-engineered boring tool built for clean, accurate through-hole drilling in panel processing and furniture manufacturing. Featuring a tungsten carbide (HW) cutting head, 2 precision-ground cutting edges, and a PTFE-coated spiral for smooth chip evacuation, this left-hand rotation drill is designed to pair with multi-spindle boring machines and CNC boring centers where dowel joinery demands repeatable accuracy. The 44mm cutting height and 77mm total length make it well suited for through-hole applications in thick panels of solid wood, chipboard, MDF, and laminates alike.
Key Features
- Tungsten Carbide (HW) Cutting Head - delivers long-lasting edge retention and reliable performance across hardwood, softwood, MDF, chipboard, and coated panels, reducing the frequency of tool changes in high-production environments.
- 2 Precision-Ground Cutting Edges (Z2) - each edge is ground to close tolerances, producing consistently clean bore walls and smooth hole finishes that are critical for tight-fitting dowel connections.
- PTFE-Coated Spiral Portion - the orange or black P.T.F.E. coating on the spiral flutes reduces friction and prevents pitch or glue buildup, extending tool life and maintaining cutting efficiency through longer production runs.
- Precision Balanced Centre Point - ensures accurate entry positioning and stable drilling action, minimizing walkout and protecting panel face materials from chipping at the entry point.
- 2 Spiral Flutes - promote efficient chip evacuation during through-hole drilling, reducing heat buildup and keeping the cutting zone clear for consistent hole quality.
- Super-Strength Steel Body - provides the rigidity needed to resist deflection during high-speed boring, maintaining dimensional accuracy across repeated cycles.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10x26mm shank allows secure, precise mounting in boring machine spindles with easy axial positioning for consistent depth control across multiple spindles.
- Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines, ensuring proper cutting geometry and clean results when installed on the correct spindle side.
- 44mm Cutting Height / 77mm Total Length - the extended length design accommodates through-hole drilling in thicker panels where standard-length drills cannot reach, expanding the range of workpieces the tool can process.
Why This Product
- The left-hand rotation geometry is purpose-built for left-side spindle positions on multi-spindle boring machines - using the correct rotation direction ensures proper chip clearance, clean hole walls, and prevents tool damage that would result from running a right-hand drill in a left-hand spindle.
- The HW carbide head combined with PTFE spiral coating addresses two of the most common causes of boring tool failure in panel processing - edge wear and resin buildup - making this drill a practical choice for furniture production environments running composite wood panels and laminates.
- At 77mm total length with a 44mm cutting height, this drill handles through-holes in panel thicknesses that shorter dowel drills cannot reach, eliminating the need for two-sided drilling operations in many applications and improving cycle time.
- The parallel shank with driving flat and length adjusting screw allows fast, repeatable setup across all spindles on a boring machine head, which reduces downtime when tooling needs to be changed or adjusted during a production run.
Specifications
- Manufacturer Part Number: 366.060.12
- Brand: CMT Orange Tools
- Diameter: 6mm
- Cutting Height: 44mm
- Total Length: 77mm
- Shank: 10x26mm
- Number of Flutes: 2
- Blade Material: HW (Tungsten Carbide)
- Rotation: LH (Left-Hand)
- Sharpening: Through holes 60
Approved Applications
- Through-hole drilling for dowel connections in panel joinery
- Furniture manufacturing and cabinet panel processing
- Boring in chipboard, MDF, HDF, hardwood, softwood, plywood, and laminates
- Use in multi-spindle CNC boring machines and CNC boring centers
- Use in panel processing centers and boring machines equipped with an adapter or chuck
Frequently Asked Questions
What does left-hand (LH) rotation mean, and does it matter which spindle I install this drill in?
Left-hand rotation means the drill turns counter-clockwise when viewed from the shank end. On multi-spindle boring machines, spindle positions are designated as either right-hand or left-hand. Installing a left-hand drill in a left-hand spindle ensures the cutting edges engage the material correctly, producing clean hole walls and proper chip evacuation. Installing it in the wrong spindle would cause the tool to rub rather than cut, resulting in heat damage, poor hole quality, and premature tool failure.
What is the shank size and how does the length adjusting screw work?
The shank measures 10x26mm and features a parallel profile with a driving flat. The driving flat prevents the tool from rotating in the spindle bore during cutting. The length adjusting screw allows the axial position of the drill to be set precisely, which is essential on multi-spindle boring heads where all drills must be set to a consistent depth to produce uniform through-holes across an entire panel in a single pass.
What materials can this dowel drill be used on?
The HW (tungsten carbide) cutting head is suited for through-hole boring in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels. The PTFE-coated spiral helps manage pitch and adhesive residue that can accumulate when drilling composite or coated panel materials, keeping the flutes clear for consistent chip evacuation.
Why does this drill have two flutes rather than one?
The 2-flute (Z2) design provides 2 spiral channels for chip removal during through-hole drilling. With both flutes actively clearing material, the cutting zone stays cleaner, heat buildup is reduced, and the drill maintains more consistent cutting performance over longer production runs compared to a single-flute design. The 2 precision-ground cutting edges also help balance the cutting forces acting on the tool, contributing to a cleaner bore finish.
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