Product Description
CMT 309.064.12 Dowel Drill 1/4" x 43 x 70mm Left-Hand by CMT is a precision carbide-tipped boring tool engineered for clean, accurate blind-hole drilling in panel processing and furniture manufacturing. Featuring a 1/4" diameter HW (tungsten carbide) cutting head, this left-hand rotation dowel drill is purpose-built for multi-spindle boring machines and CNC panel processing centers where consistent hole quality in chipboard, MDF, hardwood, and coated materials is essential. The long-series 70mm overall length allows the drill to reach deeper into panel stock, making it a reliable choice for thick-panel dowel joinery and cabinet assembly work.
Key Features
- HW (Tungsten Carbide) Cutting Head - hard carbide material maintains a sharp edge longer than standard steel, reducing tool changes and delivering consistent bore quality across high-volume panel runs.
- 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide cutting edges provide balanced material removal, producing flat-bottomed blind holes suited for tight-tolerance dowel connections in furniture and cabinet work.
- 2 Negatively Ground Spurs (V2) - negatively sharpened spurs score the material perimeter before the main cutters engage, preventing tearout and delivering clean bore walls in laminates, coated panels, and veneered chipboard.
- 4 Spiral Flutes - four flutes evacuate chips efficiently during drilling, reducing heat buildup and keeping the cutting zone clear for smooth, continuous boring without clogging or pitch accumulation.
- PTFE Coating on Cutter Portion - the black or orange PTFE coating on the spiral minimizes pitch and glue adhesion, extending tool life and keeping the drill performing cleanly even in resin-rich or adhesive-treated materials.
- Precision-Balanced Centre Point - the HW centre point self-locates accurately on the workpiece surface, ensuring each hole is drilled on-center without walking or drift, which is critical for repeatable dowel alignment.
- Super-Strength Steel Body - the steel shank and body resist flex under load, maintaining drilling accuracy and reducing vibration in high-speed boring operations.
- 10 x 20mm Parallel Shank with Driving Flat and Length Adjusting Screw - the parallel shank design with a driving flat provides a secure, non-slip connection in boring machine spindles, while the length adjusting screw allows precise depth-setting without additional tooling.
- Left-Hand (LH) Rotation - correct rotation direction for left-hand spindle positions on multi-spindle boring machines, ensuring the spurs and cutting edges engage the material in the designed direction for optimal hole quality.
- Long-Series 70mm Overall Length - the extended body accommodates deeper blind holes in thicker panel stock where a standard-series drill would not reach the required depth.
Why This Product
- The 43mm cutting height combined with a 70mm overall length makes this drill the right choice for thick-panel applications - solid wood, MDF, and chipboard panels requiring deep blind holes for dowel joinery that shorter drills simply cannot reach.
- Negatively ground spurs paired with an HW cutting head mean the drill produces clean entry points and flat-bottomed holes in laminates and coated panels without chipping or delamination at the bore edge - a critical requirement in finished furniture components.
- The PTFE-coated spiral and carbide construction together address two of the most common causes of premature dowel drill failure: edge wear and pitch buildup - making this tool a durable, low-maintenance option for production boring environments.
- The parallel shank with driving flat and length adjusting screw allows straightforward installation and repeatable depth setting on multi-spindle boring machines and CNC boring centers, reducing setup time and keeping production moving.
Specifications
- Manufacturer Part Number: 309.064.12
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 1/4"
- Cutting Height: 43mm
- Total Length: 70mm
- Shank: 10 x 20mm parallel shank with driving flat and length adjusting screw
- Number of Flutes: 4
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (tungsten carbide)
- Rotation: Left-Hand (LH)
- Coating: Black or orange PTFE on cutter portion
Approved Applications
- Blind hole drilling for dowel connections
- Panel drilling in furniture manufacturing
- Cabinet making and case goods production
- Chipboard and particleboard boring
- MDF and HDF panel processing
- Hardwood and softwood dowel joinery
- Plywood and coated panel drilling
- Laminate surface boring without tearout
- Multi-spindle CNC boring machine operations
- CNC boring center and panel processing center use
Frequently Asked Questions
Why does this dowel drill use left-hand (LH) rotation?
Multi-spindle boring machines typically have both right-hand and left-hand spindle positions arranged across the machine head. Left-hand rotation drills like this one are designed specifically for the left-hand spindle positions so the cutting edges and spurs engage the material in the correct direction, producing the same clean, flat-bottomed hole quality as the right-hand drills on their respective spindles. Using the correct rotation direction is essential for proper cutting action and hole quality.
What does the PTFE coating on the spiral do?
The PTFE coating applied to the cutter portion and spiral of this dowel drill prevents pitch, resin, and glue from adhering to the tool surface during boring. This is particularly beneficial when drilling MDF, chipboard, or materials that have been treated with adhesives, as buildup on uncoated flutes can increase friction, raise cutting temperatures, and degrade hole quality over time. The coating helps maintain consistent performance and extends the working life of the tool.
What is the purpose of the negatively ground spurs on this drill?
The 2 negatively ground spurs score and sever the material fibers at the outer perimeter of the hole before the main HW cutting edges remove the core material. This sequence prevents the material from tearing or lifting at the bore edge, which is especially important when drilling laminates, coated panels, and veneered chipboard where surface integrity at the hole opening is critical for appearance and fit in finished furniture components.
Can this drill be used in a handheld drill or standard drill press?
This drill is designed with a 10 x 20mm parallel shank featuring a driving flat and length adjusting screw, which is a configuration standard for industrial multi-spindle boring machines, CNC boring centers, and panel processing centers. The shank format and left-hand rotation are matched to those machine types. Use on equipment other than compatible boring machines is not the intended application for this tool.
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