Product Description
CMT 311.060.11 Dowel Drill 6 x 35 x 70mm RH by CMT is a precision-engineered 2-flute dowel boring bit designed for clean, accurate blind hole drilling in panels and solid wood components. Built on a super-strength steel body with a tungsten carbide (HW) head, this right-hand rotating drill delivers flat-bottom holes with crisp, tearout-free walls - making it a reliable choice for furniture manufacturing, cabinet assembly, and high-volume panel processing where consistent dowel joint quality is critical. The PTFE-coated spiral flutes resist pitch and glue buildup during repeated boring cycles, helping maintain cutting performance over extended use.
Key Features
- Hardmetal (HW) cutting head with 2 precision-ground cutting edges - tungsten carbide construction delivers long-lasting sharpness through chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels without rapid dulling.
- 2 negatively ground spurs (V2 configuration) - score the material perimeter cleanly before the main cutting edges engage, producing flat-bottomed blind holes with smooth bore walls and no fiber tearout at the entry point.
- PTFE-coated spiral flutes - the orange or black P.T.F.E. coating on the spiral portion prevents resin, pitch, and adhesive buildup, reducing friction and keeping the tool running cleanly through coated and glued panel materials.
- Precision-balanced centre point - keeps the drill accurately positioned at the start of each hole, minimizing walking or drift and ensuring consistent dowel hole placement across repeated boring operations.
- 2-flute spiral design with 35mm cutting height - the longer flute geometry supports efficient chip evacuation during deeper blind hole boring, suitable for long-series applications requiring a 70mm overall tool length.
- 10 x 30mm parallel shank with driving flat and length adjusting screw - the driving flat transfers torque securely within multi-spindle boring machine chucks or CNC boring center holders, while the adjusting screw allows precise depth setting without additional tooling.
- Right-hand (RH) rotation - compatible with standard right-hand boring spindles found on CNC boring centers and multi-spindle panel processing equipment.
Why This Product
- The 35mm cutting height and 70mm overall length make this drill well suited for deeper blind hole applications where a standard short-series dowel bit cannot reach the required boring depth - without compromising hole quality or wall smoothness.
- The combination of a precision-balanced centre point and negatively ground spurs addresses two of the most common boring quality problems at once: hole placement drift and surface tearout - both of which affect the fit and appearance of dowel-joined furniture and cabinet panels.
- The PTFE-coated spiral resists pitch and adhesive accumulation during continuous production boring, helping reduce cleaning downtime and maintaining consistent chip clearance between holes in high-cycle panel processing environments.
- The parallel shank with driving flat and length adjusting screw gives operators a fast, secure way to set and lock boring depth in multi-spindle and CNC boring machine setups - reducing setup time and the risk of inconsistent hole depth across a panel.
Specifications
- Manufacturer Part Number: 311.060.11
- Brand: CMT Orange Tools
- Description: Dowel Drill 6 x 35 x 70mm RH
- Diameter: 6mm
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10 x 30mm parallel shank with driving flat and length adjusting screw
- Rotation: Right-hand (RH)
- Number of Flutes: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Number of Cutting Edges: 2
- Blade Material: HW (Hardmetal / Tungsten Carbide)
- Body Material: Super-strength steel
- Coating: P.T.F.E. (orange or black) on spiral portion
- Status: Active
Approved Applications
- Blind hole drilling for dowel connections in panel and solid wood assemblies
- Furniture manufacturing and cabinet making
- Drilling in solid wood (hardwood and softwood)
- Drilling in chipboard and particle board
- Drilling in MDF and HDF panels
- Drilling in plywood
- Drilling in laminates and coated panels
- Drilling in plastics
- Use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers
- Use in boring machines equipped with a compatible adapter or chuck
Frequently Asked Questions
What is the difference between this long-series dowel drill and a standard-series version?
This drill has a 70mm total length and a 35mm cutting height, placing it in the long-series category. The additional length allows it to bore blind holes to greater depths than shorter-series equivalents, which is useful in panel assemblies where the dowel connection requires deeper engagement for structural integrity.
What does the driving flat on the shank do, and why does it matter?
The 10 x 30mm parallel shank includes a flat ground along its side. When seated in a boring machine chuck or spindle holder, the driving flat provides a positive grip surface that transfers torque from the spindle to the tool without relying solely on clamping friction. This reduces the risk of the bit spinning or shifting during boring, helping maintain consistent hole position and depth.
Why are the spurs negatively ground on this dowel drill?
Negatively ground spurs are angled to shear the material fibers at the perimeter of the hole before the main cutting edges remove the core material. This shearing action produces a cleaner entry point with minimal surface tearout - particularly important when boring laminates, coated panels, and veneered materials where a ragged hole edge would be visible in the finished joint.
What purpose does the P.T.F.E. coating on the spiral serve during continuous boring operations?
The P.T.F.E. coating applied to the spiral portion of the drill reduces the tendency of resin, pitch, and adhesive residues to bond to the tool surface during repeated boring. By keeping the flutes cleaner, the coating supports consistent chip evacuation and reduces the friction that can cause heat buildup - both of which help maintain bore quality over extended production runs in materials like chipboard, MDF, and coated panels.
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