Product Description
CMT 311.090.11 Dowel Drill 9 x 35 x 70mm RH by CMT is a precision-engineered 2-flute tungsten carbide (HW) dowel drill designed for accurate blind hole boring in panel processing, furniture manufacturing, and cabinet making. Built on a super-strength steel body with a PTFE-coated spiral and a hardmetal precision-ground cutting head, this 9mm diameter right-hand drill delivers clean, flat-bottom holes suited for dowel joinery in solid wood, chipboard, MDF, and laminated panels. The long-series 70mm overall length allows for deeper reach in panel applications where standard-length drills fall short.
Key Features
- Hardmetal (HW) cutting head with 2 precision-ground cutting edges - tungsten carbide construction maintains a sharp cutting edge through extended runs in abrasive materials like MDF, chipboard, and laminates, reducing downtime for tool changes.
- 2 negatively ground spurs (V2) - score the material ahead of the cutting edges to produce clean bore walls and flat-bottom holes with minimal tearout, critical for furniture-grade panel work.
- PTFE-coated spiral portion - the orange or black non-stick coating prevents pitch and adhesive buildup in the flutes, helping chips evacuate cleanly and extending the interval between cleanings.
- Precision balanced centre point - keeps the drill on target from the moment of entry, reducing wander and ensuring consistent hole placement for accurate dowel alignment.
- 2 spiral flutes - promote efficient chip evacuation from blind holes, preventing packing that can cause overheating or surface damage in the bore.
- 10 x 30mm parallel shank with driving flat and length adjusting screw - seats securely in multi-spindle CNC boring machines and boring centers, with the adjusting screw allowing precise depth setting without additional tooling.
- Long-series 70mm overall length with 35mm cutting height - provides the reach needed for deeper blind hole applications in panel processing, where a standard-length drill cannot achieve the required bore depth.
- Right-hand (RH) rotation - compatible with the standard spindle direction of multi-spindle CNC boring machines and panel processing centers configured for RH tooling.
Why This Product
- The combination of a hardmetal cutting head and negatively ground spurs makes this drill a dependable choice for furniture manufacturers who need consistently clean, tearout-free holes across large production runs in coated panels and composite boards.
- The PTFE-coated spiral addresses a common production problem - pitch and glue adhesion in the flutes - by providing a low-friction surface that keeps the tool running cleaner for longer between maintenance stops.
- At 70mm overall length with a 35mm cutting height, this long-series drill reaches bore depths that standard dowel drills cannot, making it the appropriate selection for deeper panel assemblies and thicker substrate stacks.
- The parallel shank with driving flat and length adjusting screw is engineered for fast, repeatable setup on multi-spindle CNC boring machines and boring centers, reducing changeover time and improving positional accuracy across multiple spindles.
Specifications
- Manufacturer Part Number: 311.090.11
- Brand: CMT Orange Tools
- Diameter: 9mm
- 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 Grind: Negatively ground spurs
- Blade Material: HW (hardmetal / tungsten carbide)
- Rotation: Right-hand (RH)
- Spiral Coating: PTFE (orange or black)
Approved Applications
- Blind hole drilling for dowel connections
- Panel drilling in furniture manufacturing
- Cabinet making and case construction
- Boring in solid wood (hardwood and softwood)
- Chipboard and particle board processing
- MDF and HDF panel boring
- Plywood drilling
- Laminates and coated panel drilling
- Use on multi-spindle CNC boring machines and boring centers
- Use on panel processing centers with compatible spindle adapters or chucks
Frequently Asked Questions
What is the difference between this long-series dowel drill and a standard-length version?
This drill has a 70mm overall length with a 35mm cutting height, placing it in the long series. A standard-length dowel drill of the same diameter would have a shorter overall length and less cutting height. The long-series design provides additional reach for deeper blind holes in thicker panels or panel stacks where a shorter drill would not achieve the required bore depth.
What does "negatively ground spurs" mean and why does it matter for panel boring?
Negatively ground spurs are sharpened with a geometry that scores the material surface ahead of the main cutting edges. This pre-scoring action severs the surface fibers cleanly before the cutting edges remove material, resulting in flat-bottomed blind holes with clean walls and minimal edge breakout - an important quality requirement in furniture-grade and coated panel work where visible tearout is not acceptable.
What machines is this dowel drill compatible with?
The 10 x 30mm parallel shank with driving flat and length adjusting screw is designed for use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers. It can also be used in boring machines equipped with an appropriate adapter or chuck that accepts a 10mm parallel shank.
What is the purpose of the PTFE coating on the spiral?
The PTFE (polytetrafluoroethylene) coating applied to the spiral portion of the drill creates a low-friction, non-stick surface. This prevents pitch, resin, and adhesive residue from bonding to the flutes during cutting. The result is more consistent chip evacuation from blind holes, reduced heat buildup, and a longer interval between tool cleanings - especially beneficial in production runs involving chipboard, MDF, or pre-glued dowel applications.
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