Product Description
The CMT 346.050.12 Dowel Drill with Threaded Shank is a precision carbide-tipped boring bit engineered for direct mounting to multi-spindle boring machines via its M10 threaded shank - no adapter required. Spinning in a left-hand (LH) rotation, this 5mm diameter bit is purpose-built for clean, flat-bottom dowel holes in solid wood, chipboard, MDF, and a wide range of engineered panel materials. With a 43mm cutting height and a 63mm relative length, it delivers the depth and reach needed for production-grade panel processing on CNC boring centers and industrial boring machines alike.
Key Features
- Carbide-Tipped (TCT) Construction - tungsten carbide cutting edges bonded to a high-strength steel body deliver long service life and consistent cutting performance even in abrasive materials like MDF and chipboard, reducing downtime and replacement frequency.
- M10 Threaded Shank for Direct Mounting - threads directly onto multi-spindle boring machine spindles without an adapter, simplifying setup, improving concentricity, and minimizing runout for repeatable bore accuracy.
- Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring heads, ensuring correct chip evacuation direction and clean entry cuts on the workpiece face.
- 2 Precision-Ground Spurs (2 Flutes) - twin spurs score the material perimeter before the carbide flutes cut, producing clean bore walls and flat-bottom holes with minimal tearout in solid wood, laminates, and coated panels.
- HW (Carbide) Blade Material - hard metal carbide construction maintains cutting geometry longer than high-speed steel alternatives, supporting high-volume production cycles without frequent resharpening.
- 43mm Cutting Height - provides ample depth capacity for standard dowel joinery applications, accommodating common dowel depths used in cabinet and furniture panel construction.
Why This Product
- The M10 threaded shank allows direct installation onto compatible multi-spindle boring machine spindles - eliminating the cost and alignment complexity of a separate chuck or adapter, and keeping your boring head compact and balanced.
- Left-hand rotation makes this bit the correct choice for LH spindle positions on dual-head or gang-boring machines, where using the wrong rotation direction would result in poor hole quality and accelerated wear.
- The 5mm diameter is a standard dowel sizing for furniture and cabinet panel boring, making this bit a direct fit for common production joinery workflows without custom tooling.
- Carbide-tipped (TCT) construction handles the abrasive nature of chipboard, MDF, and HDF - materials that rapidly dull lesser tooling - making this bit well suited for high-cycle panel processing environments.
Specifications
- Manufacturer Part Number: 346.050.12
- Brand: CMT Orange Tools
- Diameter: 5mm (13/64 in.)
- Cutting Height: 43mm (1-11/16 in.)
- Relative Length: 63mm (2-31/64 in.)
- 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
- Multi-spindle CNC boring machines
- CNC boring centers
- Panel processing centers
- Industrial boring machines with M10 threaded spindles
- Solid wood dowel boring
- Chipboard and particleboard panel boring
- MDF and HDF boring
- Plywood and engineered panel boring
- Laminated and coated panel boring
- Furniture and cabinet component joinery
Frequently Asked Questions
What type of shank does this dowel drill use, and why does it matter?
This bit uses an M10 threaded shank, which allows it to mount directly onto compatible multi-spindle boring machine spindles without requiring a separate adapter or chuck. This direct-mount design improves concentricity and reduces runout, contributing to cleaner, more consistent bore holes in production environments.
Is this bit intended for right-hand or left-hand spindle positions?
This bit is designed for left-hand (LH) rotation exclusively. It is intended for use in left-hand spindle positions on multi-spindle boring machines. Using it on a right-hand spindle would result in incorrect cutting direction and poor hole quality. CMT offers separate right-hand versions for RH spindle positions.
What materials can this 5mm dowel drill cut through?
The carbide-tipped (TCT) construction makes this bit suitable for solid hardwood, softwood, chipboard, MDF, HDF, plywood, laminates, and coated panels. The carbide cutting edges hold their geometry well in abrasive engineered panel materials such as MDF and chipboard, which are known to dull standard high-speed steel tooling quickly.
What do the 43mm cutting height and 63mm relative length mean in practice?
The 43mm cutting height is the usable depth the bit can bore into the workpiece - providing ample capacity for standard furniture and cabinet dowel depths. The 63mm relative length is the overall measurement of the bit body, which determines compatibility with your machine's spindle clearance and stroke depth settings. Always verify both dimensions against your machine's specifications before use.
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