Product Description
CMT 311.095.11 Dowel Drill - 3/8" Diameter, 2 Flute, 70mm Long Series, Right-Hand Rotation is a precision-engineered boring tool from CMT, designed for drilling clean, flat-bottom blind holes used in dowel joinery, panel assembly, furniture manufacturing, and cabinet making. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this long-series drill handles solid wood, chipboard, MDF, laminates, and coated panels with consistent accuracy across multi-spindle and CNC boring applications.
Key Features
- 2 HW Precision-Ground Cutting Edges - Tungsten carbide cutting edges deliver long-lasting sharpness and clean bore walls even in abrasive materials like MDF, chipboard, and laminates, reducing tool change frequency on production lines.
- 2 Negatively Ground Spurs (V2) - Negatively ground spurs shear panel surfaces cleanly at entry and exit, minimizing tearout and producing flat-bottom holes suitable for tight-fitting dowel connections.
- PTFE-Coated Spiral Flutes - Orange or black P.T.F.E. coating on the spiral portion prevents pitch, resin, and adhesive buildup, keeping chips clearing freely and maintaining bore quality over extended production runs.
- Precision-Balanced Centre Point - The HW centre point self-positions accurately on contact, preventing drift during entry and ensuring repeatable hole placement critical in multi-spindle and CNC boring setups.
- Parallel Shank with Driving Flat and Length Adjusting Screw - Standardized 10x30mm shank with a driving flat resists rotation under torque, while the length adjusting screw allows fine depth tuning for consistent blind-hole depth in automated panel processing.
- Long-Series 70mm Overall Length with 35mm Cutting Height - Extended reach compared to short-series equivalents allows deeper boring into panels without interference, expanding compatibility with a wider range of boring heads and spindle configurations.
- Right-Hand (RH) Rotation - Configured for standard right-hand spindle direction, compatible with the majority of CNC boring centers, multi-spindle boring machines, and panel processing equipment.
Why This Product
- The 70mm long-series length provides additional clearance and deeper reach than standard short-series dowel drills, making it the practical choice for thicker panels or boring heads with limited chuck exposure.
- The combination of negatively ground spurs and a carbide cutting head produces clean, accurate holes in coated panels, laminates, and MDF without surface chipping - a direct quality advantage in finished furniture and cabinet production.
- P.T.F.E. coating on the spiral reduces pitch and glue accumulation, extending usable tool life and lowering maintenance downtime in continuous-run panel boring operations.
- The 10x30mm parallel shank with driving flat and length adjusting screw ensures secure, repeatable seating in multi-spindle boring machine chucks and boring head adapters, maintaining positional accuracy across production cycles.
Specifications
- Manufacturer Part Number: 311.095.11
- Brand: CMT Orange Tools
- Diameter: 3/8"
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10x30mm
- Number of Flutes: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-hand (RH)
- Shank Type: Parallel shank with driving flat and length adjusting screw
- Coating: P.T.F.E. (orange or black) on spiral portion
Approved Applications
- Blind hole drilling for dowel joinery and dowel connections
- Panel boring in furniture manufacturing and cabinet making
- Multi-spindle CNC boring machine operations
- CNC boring center and panel processing center use
- Boring in chipboard, MDF, HDF, solid hardwood, softwood, plywood, laminates, and coated panels
- High-volume production panel drilling requiring consistent hole quality
Frequently Asked Questions
What shank does the CMT 311.095.11 use, and what machine compatibility does it offer?
This dowel drill uses a 10x30mm parallel shank fitted with a driving flat and a length adjusting screw. This shank configuration is compatible with multi-spindle CNC boring machines, CNC boring centers, and panel processing centers that accept a 10mm parallel shank with driving flat. The length adjusting screw allows fine-tuning of boring depth for precise blind-hole control.
What is the difference between the cutting height and the total length on this drill?
The total length of 70mm represents the full end-to-end measurement of the drill, while the cutting height of 35mm refers specifically to the usable boring depth - the portion of the drill that actively removes material. The remaining length is taken up by the 10x30mm shank section. The 35mm cutting height supports deeper blind holes than short-series equivalents, which is the defining characteristic of this long-series design.
Why are the spurs described as "negatively ground" on this dowel drill?
Negatively ground spurs are sharpened with a negative rake geometry, meaning the cutting edge is angled to shear the panel surface cleanly at the perimeter of the hole before the main cutting edges remove material. This reduces surface chipping and tearout at the bore entry, which is critical when drilling laminates, coated panels, and veneered chipboard where surface finish quality directly affects the assembled joint appearance.
What does the P.T.F.E. coating on the spiral portion do in practice?
The P.T.F.E. (polytetrafluoroethylene) coating applied to the spiral flutes of this drill acts as a non-stick barrier that prevents pitch, wood resin, and adhesive residue from bonding to the tool surface. In continuous panel boring operations - particularly with MDF, chipboard, and glue-laminated materials - this buildup would otherwise restrict chip clearance and increase heat, degrading hole quality and shortening tool life. The coating keeps chips flowing freely and maintains bore accuracy over extended use.
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