Product Description
CMT 311.082.11 Dowel Drill 8.2 x 35 x 70mm RH is a precision boring tool engineered for clean, flat-bottom blind holes in panel-based furniture manufacturing and cabinet making. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this 8.2mm right-hand rotation dowel drill is purpose-designed for high-volume CNC boring operations, multi-spindle machines, and panel processing centers. The spiral portion carries a P.T.F.E. coating that resists pitch and resin buildup during repetitive dowel hole drilling in chipboard, MDF, solid wood, plywood, laminates, and coated panels - keeping the tool cutting cleanly through long production runs.
Key Features
- Tungsten Carbide (HW) Cutting Head: hardmetal construction delivers durable cutting performance through abrasive engineered panels like chipboard, MDF, and HDF, reducing the need for frequent tool changes in production environments.
- P.T.F.E.-Coated Spiral Flutes: the orange or black P.T.F.E. coating on the 2 spiral flutes prevents pitch, resin, and glue from adhering to the tool body, maintaining chip evacuation and extending working life between regrinds.
- Precision-Balanced Centre Point: the HW centre point is precision balanced to locate accurately on the workpiece, producing consistently centered bore positions critical for tight-tolerance dowel joint alignment.
- 2 Negatively Ground Spurs (V2): negatively ground spur geometry scores the panel surface ahead of the cutting edges, producing clean bore walls and sharp, tear-free entry holes in laminates and coated panel materials.
- 2 Precision-Ground HW Cutting Edges: both carbide cutting edges are ground to tight tolerances, delivering flat-bottom blind holes sized accurately for standard dowel pin fitment.
- 10 x 30mm Parallel Shank with Driving Flat and Length Adjusting Screw: the parallel shank design with driving flat secures positively in spindle chucks and multi-spindle boring heads, while the length adjusting screw allows precise drilling depth setting without recalibrating the machine.
- 8.2mm Cutting Diameter / 35mm Cutting Height / 70mm Total Length (Long Series): the longer 70mm body suits deeper boring applications in thicker panels where standard-length dowel drills cannot achieve the required depth.
- Right-Hand (RH) Rotation: correct rotation direction for standard CNC boring centers and multi-spindle machines running conventional right-hand spindle configurations.
Why This Product
- The 70mm total length and 35mm cutting height make this drill suitable for boring blind holes in thicker panel stock where a standard-series dowel drill would fall short - a practical advantage on panel processing lines handling furniture carcass components.
- Negatively ground spurs combined with precision-ground HW cutting edges produce clean, splinter-free entry and flat-bottom holes in laminates and coated panels - reducing rejects and finishing time on visible surfaces.
- The P.T.F.E.-coated spiral minimizes resin and glue adhesion during high-cycle boring runs in chipboard and MDF, keeping chip evacuation consistent and reducing downtime for tool cleaning.
- The parallel shank with driving flat and length adjusting screw integrates directly into standard CNC boring heads and multi-spindle machines, allowing fast, repeatable depth setup across a production shift without guesswork.
Specifications
- Manufacturer Part Number: 311.082.11
- Brand: CMT Orange Tools
- Diameter: 8.2mm
- 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 Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Coating: P.T.F.E. (orange or black) on spiral portion
Approved Applications
- Blind hole drilling for dowel joint connections
- Panel drilling in furniture manufacturing
- Cabinet carcass boring
- Solid wood dowel hole production
- Chipboard and particleboard panel boring
- MDF and HDF panel drilling
- Plywood boring
- Laminate and coated panel drilling
- Plastic panel drilling
Frequently Asked Questions
What is the difference between a standard-series and long-series dowel drill, and why does this tool use the long-series format?
A long-series dowel drill has a greater total length than a standard-series equivalent at the same diameter. This CMT drill has a 70mm total length, which allows it to reach deeper into the spindle head assembly and bore blind holes in thicker panel stock where a shorter tool would not achieve the necessary cutting depth. The 35mm cutting height supports deeper blind bores while the full 70mm body provides the reach needed in multi-spindle machine configurations.
What does the P.T.F.E. coating on the spiral flutes actually do during a boring operation?
P.T.F.E. is a low-friction, non-stick material applied to the spiral portion of the drill body. During boring in resinous materials like chipboard, MDF, or adhesive-coated panels, resins and glue tend to adhere to uncoated steel surfaces, restricting chip flow and generating heat. The P.T.F.E. coating reduces this adhesion, helping chips evacuate freely through the flutes and maintaining cutting efficiency over extended production runs.
Why are the spurs on this dowel drill "negatively ground," and what does that mean for hole quality?
Negatively ground spurs are sharpened with a geometry that scores and severs the panel surface fibers before the main cutting edges remove material. This scribing action is particularly beneficial in laminate and coated panel applications, where a conventional spur geometry can lift or chip the surface layer. The result is a clean, defined bore perimeter with minimal tear-out at the entry point - important for visible furniture panel faces.
What machines is this dowel drill compatible with, and does the shank type matter for installation?
This drill uses a 10 x 30mm parallel shank with a driving flat and a length adjusting screw. The driving flat provides positive rotational drive in spindle chucks, preventing slippage under load. The length adjusting screw allows the operator to set cutting depth precisely within the spindle holder. This shank style is compatible with multi-spindle CNC boring machines, CNC boring centers, and panel processing centers that accept this shank format, as well as boring machines equipped with a suitable adapter or chuck.
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