Product Description
CMT 346.120.12 Dowel Drill with Threaded Shank - 12mm (15/32") Diameter, M10 Shank, Left-Hand Rotation by CMT is a professional-grade carbide-tipped boring tool engineered for precise, flat-bottom dowel holes in solid wood, chipboard, MDF, and a wide range of panel materials. With a direct M10 threaded shank, this left-hand rotation drill mounts directly to multi-spindle boring machines and CNC panel processing centers without requiring an adapter, delivering consistent hole quality and fast cycle times in production environments. The 12mm cutting diameter and 43mm cutting height make it well-suited for standard dowel joinery and cabinet construction applications where clean, repeatable bores are essential.
Key Features
- Carbide-Tipped (HW/TCT) Construction - tungsten carbide tipped cutting edges deliver long service life and maintain sharpness through high-volume production runs in chipboard, MDF, hardwood, and coated panels.
- M10 Threaded Shank (Direct Mount) - threads directly into multi-spindle boring machine spindles without an adapter, reducing setup time and eliminating the runout risk that comes with adapter-based mounting.
- Left-Hand (LH) Rotation - matches left-hand spindle positions on multi-spindle boring machines, ensuring the cutting geometry engages the material correctly for clean entry and exit on LH spindle stations.
- 2 Spurs and 2 Cutting Flutes - precision-ground spurs score the perimeter of the bore before the flutes remove material, producing clean hole walls and flat-bottom holes with minimal tearout in wood and composite panels.
- 43mm Cutting Height - provides sufficient depth capacity for full dowel pocket drilling in standard cabinet and furniture panel thicknesses without repositioning or multiple passes.
- 63mm Relative Length - compact overall length keeps the tool rigid in the spindle, reducing vibration and contributing to hole accuracy at production speeds.
Why This Product
- The M10 threaded shank eliminates the need for a separate chuck or adapter on compatible multi-spindle boring machines, streamlining tool changes and keeping spindle-to-tool runout to a minimum for tighter hole tolerances.
- Left-hand rotation is a requirement - not an option - for LH spindle stations on multi-spindle boring centers. Using a correctly handed drill on every spindle position ensures balanced cutting forces and consistent hole quality across the full panel.
- The carbide-tipped (HW) cutting material resists wear from abrasive materials like MDF, particleboard, and laminates, extending the interval between sharpenings or replacements compared to high-speed steel alternatives in panel processing applications.
- With 2 precision-ground spurs and 2 flutes working together, this drill is optimized for flat-bottom, clean-walled dowel holes - the exact geometry required for reliable dowel joint assembly in cabinet boxes, furniture carcasses, and panel products.
Specifications
- Manufacturer Part Number: 346.120.12
- Brand: CMT Orange Tools
- Diameter: 12mm (15/32")
- Cutting Height: 43mm (1-11/16")
- Relative Length: 63mm (2-31/64")
- Shank: M10 threaded
- Rotation: Left-hand (LH)
- Number of Spurs: 2
- Number of Teeth: 2
- Blade Material: HW (Carbide-Tipped)
- Series: Threaded Shank Dowel Drill
Approved Applications
- Dowel hole boring in solid hardwood and softwood
- Flat-bottom hole drilling in chipboard and particleboard
- Precision boring in MDF and HDF panels
- Dowel joinery in plywood and coated panels
- Cabinet box and furniture carcass production
- Multi-spindle CNC boring machine and boring center operations (LH spindle positions)
- Panel processing center applications requiring M10 threaded spindle tooling
Frequently Asked Questions
What machines is this dowel drill compatible with?
This drill is designed for multi-spindle boring machines, CNC boring centers, and panel processing centers that use M10 threaded spindles. The M10 threaded shank mounts directly into compatible spindle positions without requiring an adapter or chuck.
Why does rotation direction matter, and how do I know if I need a left-hand drill?
Multi-spindle boring machines typically include both right-hand and left-hand spindle positions. A left-hand (LH) drill must be used in LH spindle stations so the cutting edges rotate into the material correctly. Installing a right-hand drill in a left-hand spindle - or vice versa - will result in poor hole quality and accelerated tool wear. Check your machine's spindle layout to confirm which stations require LH tooling before ordering.
What materials can this drill be used on?
The carbide-tipped (HW) construction makes this drill suitable for solid hardwood, softwood, chipboard, MDF, HDF, plywood, laminates, and coated panels - materials commonly encountered in cabinet and furniture panel production.
What is the maximum drilling depth this tool can achieve?
The cutting height of this drill is 43mm (1-11/16"), which defines the usable cutting depth. This is the depth of bore the flutes and cutting edges can produce in a single pass, making it well-matched to standard dowel pocket depths used in cabinet and furniture assembly.
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