Product Description
CMT 311.064.11 Dowel Drill 1/4" x 35 x 70mm RH by CMT is a precision-engineered 2-flute boring tool designed for blind hole drilling in panel processing, furniture manufacturing, and cabinet making. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this right-hand rotation drill produces clean, flat-bottomed holes ideal for dowel joinery in solid wood, chipboard, MDF, laminates, and coated panels. The spiral portion carries a P.T.F.E. coating that resists pitch and adhesive buildup, keeping the tool cutting cleanly through high-volume production runs.
Key Features
- HW (Tungsten Carbide) Cutting Head - delivers long-lasting edge retention when boring abrasive sheet goods like chipboard, MDF, and laminates, reducing downtime for tool changes in production environments.
- 2 Precision-Ground HW Cutting Edges - provide balanced, symmetrical cutting action that minimizes vibration and produces accurately sized holes for tight-fitting dowel connections.
- 2 Negatively Ground Spurs - score the material cleanly at the perimeter of the bore before the cutting edges remove material, preventing tearout and delivering smooth, clean hole walls even in coated or laminated panels.
- P.T.F.E.-Coated Spiral Flutes - the low-friction coating sheds resin, glue, and pitch so chips evacuate freely, maintaining consistent cutting performance and extending service life between sharpenings.
- Precision-Balanced Centre Point - locates the drill accurately on the bored center, ensuring positional repeatability that is critical for multi-hole dowel patterns in furniture and cabinet assembly.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 30mm shank locks securely in spindle heads and allows precise depth setting, making the drill compatible with multi-spindle CNC boring machines and panel processing centers.
- 2-Flute Long-Series Design (70mm overall length, 35mm cutting height) - the extended geometry reaches the full blind-hole depth required for standard dowel connections in panel thickness configurations that shorter drills cannot reach.
- Right-Hand (RH) Rotation - matches the standard spindle direction of most CNC boring centers and multi-spindle machines, making integration into existing setups straightforward.
Why This Product
- The 35mm cutting height in a 70mm overall package gives this drill the reach needed for deeper blind-hole boring in thicker panels - situations where standard short-series dowel drills fall short and clean hole depth matters for joint strength.
- The combination of negatively ground spurs and a carbide (HW) cutting head means the same drill handles both raw solid wood and abrasive manufactured boards like MDF and chipboard without sacrificing hole quality or edge life.
- P.T.F.E. spiral coating directly addresses a common production problem - pitch and adhesive buildup that slows chip clearance and degrades hole quality - keeping the tool performing consistently across long boring sequences.
- The parallel shank with driving flat and length adjusting screw provides a secure, adjustable mount in standard spindle heads, reducing setup time and supporting repeatable depth control across multi-hole boring patterns.
Specifications
- Manufacturer Part Number: 311.064.11
- Brand: CMT Orange Tools
- Diameter: 1/4"
- 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 Grind: Negatively ground spurs
- Number of Teeth: 2
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Coating: P.T.F.E. on spiral portion
Approved Applications
- Blind hole drilling for dowel connections and dowel joinery
- Panel drilling in furniture manufacturing
- Cabinet making and case construction
- Boring in solid hardwood and softwood
- Drilling chipboard, MDF, and HDF sheet goods
- Drilling plywood and coated or laminated panels
- Use in multi-spindle CNC boring machines and CNC boring centers
- Use in panel processing centers and boring machines with adapter or chuck
Frequently Asked Questions
What is the difference between a short-series and long-series dowel drill, and why does it matter?
This drill is a long-series design with a 70mm overall length and a 35mm cutting height. Long-series dowel drills are used when the required blind-hole depth exceeds what a standard short-series drill can reach - common in thicker panel stock or applications where deeper dowel seating is needed for joint strength. The extended cutting height of 35mm gives the tool the reach to complete those deeper bores in a single pass.
What do the negatively ground spurs do, and why does spurs grinding matter for panel work?
The 2 negatively ground spurs on this drill score the material at the outer edge of the hole before the main cutting edges remove the interior. This pre-scoring action severs surface fibers cleanly, which prevents tearout and produces smooth, defined hole walls - particularly important when boring laminates, coated panels, or veneered chipboard where a ragged entry would be visible in the finished product.
Is this drill compatible with CNC multi-spindle boring machines?
Yes. The 10 x 30mm parallel shank is equipped with a driving flat and a length adjusting screw, which are standard features for secure retention in multi-spindle CNC boring machine spindle heads and panel processing centers. The driving flat prevents rotational slippage under load, and the adjusting screw allows precise depth setting for repeatable blind-hole depth across all spindles in a multi-hole boring pattern.
What does the P.T.F.E. spiral coating do, and does it affect performance over time?
The P.T.F.E. coating applied to the spiral flutes creates a low-friction surface that prevents pitch, resin, and adhesive from bonding to the tool body. This keeps chips flowing out of the hole freely during boring, which maintains consistent cutting performance and reduces the heat buildup that can dull cutting edges prematurely. The result is longer intervals between sharpenings and more consistent hole quality across extended production runs.
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