Product Description
The CMT 308.140.11 Dowel Drill is a precision-engineered, carbide-tipped boring tool designed for clean, flat-bottom blind holes in solid wood, chipboard, MDF, and laminates. Built for right-hand rotation and sized at 35/64" (14mm) diameter with a 1-3/16" (30mm) cutting height and 2-17/64" (57.5mm) overall length, this dowel drill is a reliable choice for production boring on multi-spindle CNC boring machines, CNC boring centers, and panel processing equipment. Its negatively ground spurs and two-tooth carbide geometry make it well-suited for high-volume cabinet, furniture, and panel fabrication work where hole quality and consistency matter.
Key Features
- Tungsten Carbide (HW) Cutting Material - hard, wear-resistant carbide edges maintain sharpness through demanding production runs on chipboard, MDF, hardwood, and coated panels, reducing the need for frequent tool changes.
- Negatively Ground Spurs - the precision-sharpened spur geometry scores the perimeter of each hole cleanly before the main cutters clear the material, producing crisp bore walls and flat bottoms with minimal tearout on face and edge surfaces.
- 2-Tooth (2-Spur) Geometry - two cutting teeth and two spurs provide a balanced cutting action that delivers smooth entry and exit in both solid wood and engineered panels without excessive heat buildup or chipping.
- 10x20mm Parallel Shank - the standardized parallel shank with driving flat fits a wide range of multi-spindle boring heads, CNC boring centers, and adapter/chuck setups for quick, secure tool mounting.
- Right-Hand (RH) Rotation - matches the standard spindle direction of the majority of industrial boring machines and CNC boring centers, ensuring compatibility and correct chip evacuation without tool modification.
- Short Series Profile at 57.5mm Overall Length - the compact length reduces vibration and deflection during boring, contributing to tighter hole tolerances and more consistent dowel fit across panel assemblies.
Why This Product
- For woodworkers and panel processors who need a reliable dowel drill in the 35/64" (14mm) diameter - a common size for Euro-style cabinet and furniture construction - this bit delivers precise, repeatable blind holes that produce tight, glue-ready dowel joints.
- The negatively ground spur design directly addresses tearout on laminates and coated panels, a common problem with lower-quality boring bits, making this tool appropriate for finished or veneered panel work where surface quality is critical.
- With a 10x20mm parallel shank, this drill integrates directly into standard industrial boring machine spindles without requiring additional adapters in most setups, simplifying tooling changeovers in production environments.
- The two-flute carbide construction offers the balance of cutting efficiency and edge life needed for continuous production use across chipboard, MDF, hardwood, softwood, plywood, and laminates - reducing downtime and per-hole tooling cost.
Specifications
- Manufacturer Part Number: 308.140.11
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 14mm (35/64")
- Cutting Height: 30mm (1-3/16")
- Total Length: 57.5mm (2-17/64")
- Shank: 10x20mm
- Number of Teeth: 2
- Number of Spurs: 2
- Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
Approved Applications
- Chipboard
- MDF (Medium-Density Fiberboard)
- HDF (High-Density Fiberboard)
- Hardwood
- Softwood
- Plywood
- Laminates
- Coated Panels
Frequently Asked Questions
What machines is the CMT 308.140.11 compatible with?
This dowel drill is designed for use with multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines equipped with an adapter or chuck. The 10x20mm parallel shank is the standard interface for these machine types.
Is this a through-hole or blind-hole boring bit?
The CMT 308.140.11 is designed for blind hole drilling. Its flat-bottom geometry - produced by the negatively ground spurs and two-tooth carbide cutting edges - creates the clean, flat-bottomed recesses required for dowel joinery and Euro-style hardware installation.
What is the difference between right-hand (RH) and left-hand (LH) dowel drills, and does this bit specify which it is?
Right-hand (RH) rotation means the bit cuts when rotating clockwise when viewed from the shank end - matching the spindle direction of most standard boring machines and CNC boring centers. The CMT 308.140.11 is specifically designated as RH, so it should be used only in right-hand spindles. Left-hand spindle positions on multi-spindle boring heads require a separate LH-designated bit.
What does "negatively ground spurs" mean and why does it matter for panel work?
Negatively ground spurs are precision-sharpened outer cutting edges that are angled to score the material perimeter before the main cutters remove the core. This geometry produces clean entry and exit cuts with minimal chipping or tearout - particularly important when boring through laminates, coated panels, and veneered surfaces where a clean, crisp hole edge is essential for finished appearance and tight joinery.
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