Product Description
CMT 309.130.12 Dowel Drill - 13 x 43 x 70mm Left-Hand Rotation is a precision boring tool engineered by CMT for dowel joint drilling in furniture manufacturing, cabinet making, and panel processing applications. With a 13mm cutting diameter, a 43mm cutting height, and a 70mm overall length, this left-hand rotation drill is built to produce clean, flat-bottom blind holes in solid wood, chipboard, MDF, and coated panels. The super-strength steel body, tungsten carbide (HW) cutting head, and PTFE-coated cutter portion make this dowel drill a reliable choice for high-volume CNC boring operations where hole quality and tool longevity are both critical.
Key Features
- HW (Tungsten Carbide) Cutting Head with Precision Balanced Centre Point - the carbide head maintains accurate hole positioning and consistent bore depth, reducing misalignment in dowel joint assembly.
- 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide cutting edges deliver a smooth, clean bore wall on every pass, minimizing post-drilling cleanup on furniture panels and cabinet components.
- 2 Negatively Ground Spurs (V2) - the negative grind geometry scores the material perimeter cleanly before the cutting edges enter, preventing tearout and surface splintering on laminates and coated panels.
- 4 Spiral Flutes - four flutes efficiently evacuate chips and sawdust from the bore, reducing heat buildup and keeping the cutting zone clear during continuous multi-spindle boring cycles.
- PTFE-Coated Cutter Portion (Black or Orange) - the non-stick PTFE coating resists pitch and adhesive buildup on the cutting surfaces, extending tool service life and reducing cleaning frequency in production environments.
- Super-Strength Steel Body - the robust steel body withstands the torsional stresses of high-speed boring, providing long-term durability in demanding panel processing operations.
- Parallel Shank with Driving Flat and Length Adjusting Screw (10 x 20mm) - the driving flat prevents shank slippage under load, and the length adjusting screw allows precise depth setting to match specific boring head configurations.
- Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines, ensuring correct chip evacuation direction and clean hole entry from the correct side of the panel.
- 70mm Overall Length - Long Series - the extended length accommodates thicker panel stock and deeper blind hole requirements without requiring a tool change or extension adapter.
Why This Product
- The left-hand rotation configuration makes this drill the correct tool for LH spindle positions on multi-spindle CNC boring machines - using the wrong rotation direction causes poor hole quality and premature tool wear, so matching rotation to spindle position is essential.
- The combination of negatively ground spurs and precision-ground HW cutting edges produces flat-bottom holes with clean walls, which is critical for tight-fitting dowel connections in furniture and cabinet panels where loose joints are unacceptable.
- The PTFE coating on the cutter portion directly addresses one of the most common production problems in panel boring - pitch and glue buildup - keeping the tool cutting cleanly across longer production runs without frequent stops for tool cleaning.
- At 70mm overall length with a 43mm cutting height, this long-series design handles thicker panel stock that shorter-series drills cannot reach, making it a practical solution for operations that process a range of panel thicknesses on the same boring machine.
Specifications
- Manufacturer Part Number: 309.130.12
- Brand: CMT Orange Tools
- Diameter: 13mm
- Cutting Height: 43mm
- Total Length: 70mm
- Shank: 10 x 20mm
- Rotation: LH (Left-Hand)
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Number of Flutes: 4
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
Approved Applications
- Blind hole drilling for dowel joint connections
- Panel drilling in furniture manufacturing
- Cabinet making and case goods production
- Boring in solid hardwood and softwood
- Drilling chipboard, MDF, and HDF panels
- Boring laminates and coated panel surfaces
- Multi-spindle CNC boring machine operations (LH spindle positions)
- CNC boring center and panel processing center applications
Frequently Asked Questions
What does left-hand (LH) rotation mean, and how do I know if this drill fits my machine?
Left-hand rotation means the drill spins counterclockwise when viewed from the shank end. Multi-spindle CNC boring machines use both right-hand and left-hand spindles depending on their position in the boring head layout. You must match the drill's rotation to the spindle's rotation direction - installing an LH drill in an RH spindle will result in poor hole quality, chip evacuation problems, and premature tool failure. Consult your machine's spindle layout chart to confirm which positions require LH tools before ordering.
What is the purpose of the negatively ground spurs on this dowel drill?
The 2 negatively ground spurs score the perimeter of the hole before the main cutting edges remove material from the bore. This pre-scoring action severs the surface fibers cleanly, which prevents tearout, chipping, and splintering at the hole entry point. This is especially important when drilling laminates, coated panels, and veneered surfaces where a clean, chip-free hole edge is required for a professional finished appearance.
What does the PTFE coating on the cutter portion do in practice?
The PTFE (polytetrafluoroethylene) coating applied to the cutter portion creates a low-friction, non-stick surface on the cutting area. During boring operations, pitch from solid wood and adhesive residues from coated or laminated panels tend to accumulate on uncoated tool surfaces, dulling the cutting edges and increasing friction. The PTFE coating resists this buildup, allowing the drill to maintain sharper cutting performance over longer production runs and reducing the frequency of tool cleaning stoppages.
What shank size and type does this drill use, and is a driving flat included?
This drill uses a 10 x 20mm parallel shank. The shank includes a driving flat, which provides positive engagement between the tool and the boring head spindle to prevent rotational slippage under cutting load. It also includes a length adjusting screw, which allows you to set the precise drilling depth to match the requirements of your boring head and panel thickness setup.
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