CMT 346.100.12 Dowel Drill with Threaded Shank - 10mm (25/64") Diameter, M10 Shank, Left-Hand Rotation is a precision carbide-tipped boring tool engineered for clean, flat-bottom dowel holes in solid wood, chipboard, MDF, and a wide range of panel materials. Built by CMT with a hardmetal (HW) cutting edge and an M10 threaded shank, this 10mm left-hand dowel drill mounts directly to multi-spindle boring machines and CNC boring centers without requiring a separate adapter, making it a straightforward, reliable choice for production woodworking and panel processing operations.

Key Features

• Hardmetal (HW) Carbide Cutting Edge - tungsten carbide construction delivers long-lasting cutting performance and holds a sharp edge through repeated boring cycles in hardwood, softwood, MDF, chipboard, and coated panels, reducing downtime from tool changes.
• M10 Threaded Shank for Direct Machine Mounting - the M10 threaded shank threads directly into compatible multi-spindle boring machine spindles, eliminating the need for adapters and providing a rigid, vibration-free connection for consistent hole accuracy.
• Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines, ensuring the correct chip evacuation direction and clean bore entry on the panel face that matters most.
• 2 Precision Spurs - the double-spur geometry scores the wood fibers cleanly at the perimeter of the hole before the flutes remove material, producing smooth, tear-out-free bore walls and a flat bottom - critical for tight-fitting dowel joints.
• 2-Flute Design with 43mm Cutting Height - the dual flutes efficiently evacuate chips over the full 43mm cutting height, preventing clogging and overheating during deep boring passes into thick panels or stacked workpieces.
• Compact 63mm Relative Length - the 63mm overall length keeps the drill's footprint tight within multi-spindle head configurations, allowing close spindle spacing for high-density boring patterns.

Why This Product

• Correct rotation for left-hand spindle positions - this LH-rotation drill is purpose-built for the left-side spindles on multi-spindle boring machines, where a right-hand bit would tear material rather than cut it cleanly. Using the correct rotation eliminates surface tearout on the feed face of the panel.
• Direct M10 thread mount eliminates adapter slop - because the M10 threaded shank engages directly with the machine spindle, there is no adapter chuck to introduce runout or looseness, which translates to more precise hole placement and a better dowel fit right off the machine.
• Hardmetal carbide construction suited for abrasive engineered panels - MDF, chipboard, HDF, and coated panels are significantly more abrasive than solid wood. The HW carbide material resists the accelerated edge wear these materials cause, maintaining cutting sharpness over more panels per sharpening cycle.
• Two-spur geometry for clean entry in finished and laminated panels - on coated, veneered, or laminated surfaces where the entry face is visible, the precision-ground spurs sever fibers at the hole perimeter before material removal begins, keeping the face clean without pre-scoring or secondary operations.

Specifications

• Manufacturer Part Number: 346.100.12
• Brand: CMT Orange Tools
• Diameter: 10mm (25/64")
• 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: Hardmetal (HW) Carbide
• Series: Threaded Shank Dowel Drill

Approved Applications

• Solid hardwood and softwood furniture components
• Chipboard and particle board panels
• MDF (medium-density fiberboard)
• HDF (high-density fiberboard)
• Plywood and engineered wood panels
• Laminated and coated panels
• Cabinet and case goods production on multi-spindle boring machines
• CNC boring centers and panel processing centers