Product Description
CMT 311.065.12 Dowel Drill 6.5 x 35 x 70mm Left-Hand by CMT is a precision-engineered, left-hand rotation boring tool built for clean, accurate blind-hole drilling in panel processing and furniture manufacturing applications. Designed for use in multi-spindle CNC boring machines, panel processing centers, and compatible boring equipment, this 6.5mm diameter drill features a tungsten carbide (HW) cutting head, negatively ground spurs, and a PTFE-coated spiral for consistent, splinter-free results in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels. The long-series 70mm overall length makes it especially suited for applications requiring deeper reach and precise dowel joint alignment.
Key Features
- Tungsten carbide (HW) cutting head bonded to super-strength steel body - delivers long service life and resistance to edge breakdown even in abrasive engineered panel materials like chipboard and MDF, reducing tool replacement frequency.
- PTFE coating on the spiral portion - prevents pitch and glue buildup on the flutes during production runs, keeping the tool clean and maintaining cutting efficiency without frequent manual cleaning stops.
- 2 precision-ground HW cutting edges - provide balanced material removal and a smooth, flat-bottomed bore that is essential for tight-fitting dowel connections in furniture and cabinet assembly.
- 2 negatively ground spurs (V2 configuration) - score the workpiece surface cleanly before the cutting edges engage, eliminating tearout and producing sharp, well-defined hole walls in laminates and coated panels.
- 2 spiral flutes - evacuate chips efficiently during drilling, reducing heat buildup and keeping the bore clear for accurate depth and diameter control.
- Left-hand (LH) rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring correct chip ejection direction and proper spur engagement for that spindle orientation.
- Parallel shank 10 x 30mm with driving flat and length adjusting screw - provides secure, repeatable tool mounting and precise depth setting in compatible boring machine chucks and adapters, minimizing runout and setup time.
- Long-series 70mm overall length with 35mm cutting height - extends reach for blind-hole drilling applications that require greater boring depth while maintaining full carbide tip support throughout the cut.
Why This Product
- Designed for left-hand spindle positions - if your multi-spindle boring machine or CNC boring center requires LH rotation tooling for specific spindle stations, this drill is built to match that requirement exactly, ensuring correct cutting geometry and clean chip flow rather than pushing debris back into the hole.
- Negatively ground spurs plus PTFE coating together address two of the most common boring problems - surface tearout on laminates and glue fouling in production environments - making this drill a practical choice for high-throughput furniture and cabinet manufacturing.
- The 6.5mm diameter is a standard dowel pin size - used widely in flat-pack furniture and cabinet construction, so this tool fits directly into established joinery workflows without requiring custom fixturing or adapter components.
- HW (tungsten carbide) construction throughout the cutting head - maintains edge sharpness longer than high-speed steel alternatives when drilling abrasive materials such as chipboard and MDF, supporting consistent hole quality across extended production cycles.
Specifications
- Manufacturer Part Number: 311.065.12
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 6.5mm
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10 x 30mm - parallel shank with driving flat and length adjusting screw
- Number of Flutes: 2
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (tungsten carbide)
- Rotation: Left-hand (LH)
- Coating: PTFE on spiral portion
Approved Applications
- Blind hole drilling for dowel connections
- Panel drilling in furniture manufacturing
- Cabinet making and flat-pack assembly production
- Drilling in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
- Left-hand spindle stations on multi-spindle CNC boring machines
- CNC boring centers and panel processing centers
- Boring machines equipped with a compatible chuck or adapter
Frequently Asked Questions
What does left-hand (LH) rotation mean and how do I know if this drill is right for my machine?
Left-hand rotation means the drill spins counter-clockwise when viewed from the cutting end. Multi-spindle boring machines and CNC boring centers often have both right-hand and left-hand spindle positions. This drill is specifically engineered for LH spindle positions - using an LH drill on the correct spindle ensures the negatively ground spurs engage the workpiece in the intended direction, producing clean hole walls and proper chip ejection. Check your machine's spindle rotation specification before selecting LH or RH tooling.
What is the purpose of the PTFE coating on the spiral flutes?
The PTFE coating on the spiral portion of the drill acts as a low-friction, non-stick surface. During drilling in glued panels, laminated boards, or resin-coated materials, pitch and adhesive residues tend to accumulate on the flutes. The PTFE coating resists this buildup, helping the flutes continue evacuating chips cleanly throughout a production run and reducing the need to stop and clean the tool between operations.
What is the difference between the cutting height (35mm) and the total length (70mm)?
The cutting height of 35mm refers specifically to the length of the active boring zone - the portion of the drill that performs material removal and can enter the workpiece. The total length of 70mm includes the full tool from tip to the end of the shank. When setting up a boring machine, the cutting height determines the maximum blind-hole depth achievable, while the total length determines how the tool fits within the spindle assembly and tool holders.
Which shank system does this drill use and what does the length adjusting screw do?
This drill uses a parallel 10 x 30mm shank with a driving flat and a length adjusting screw. The driving flat provides positive rotational drive within the tool holder, preventing the shank from spinning under load. The length adjusting screw allows the operator to set the drill's axial position within the chuck with precision, which is critical for achieving consistent, repeatable bore depth across all spindles in a multi-spindle boring operation.
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