Product Description
CMT 310.060.12 Dowel Drill 6 x 27 x 57.5mm LH by CMT is a precision left-hand rotation dowel drill engineered for clean, accurate blind hole boring in furniture manufacturing, cabinet making, and panel processing operations. Built on a super-strength steel body with a tungsten carbide (HW) head, this short-series 57.5mm drill delivers repeatable precision in multi-spindle CNC boring machines, panel processing centers, and boring machines equipped with an adapter or chuck. The spiral portion is coated with P.T.F.E. to resist pitch and adhesive buildup, making it a reliable choice for high-volume production drilling in solid wood, chipboard, MDF, laminates, and coated panels.
Key Features
- Tungsten Carbide (HW) Head with 2 Precision Ground Cutting Edges (Z2) - delivers long-lasting edge retention and consistent bore quality across demanding production cycles in hardwood, softwood, chipboard, and composite panels.
- 2 Negatively Ground Spurs (V2) - shear wood fibers cleanly at the perimeter of the hole, producing smooth bore walls and flat-bottom blind holes with minimal tearout, which is critical for tight-fitting dowel connections.
- P.T.F.E.-Coated Spiral Flutes - the non-stick coating on the spiral portion prevents pitch and adhesive buildup during repeated drilling cycles, reducing cleaning downtime and extending tool service life.
- Precision Balanced Centre Point - ensures accurate hole positioning on entry, reducing drift and producing consistent hole locations for reliable dowel joint alignment in panel and cabinet assemblies.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 27mm shank with driving flat locks securely in multi-spindle boring heads and CNC chucks, while the length adjusting screw allows precise depth setting for repeatable blind hole depth.
- Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines, enabling full compatibility with symmetrical boring head configurations commonly used in furniture panel drilling.
- Short Series at 57.5mm Total Length - the compact overall length reduces spindle runout and vibration, supporting stable high-cycle drilling in CNC boring centers and panel processing equipment.
Why This Product
- The left-hand rotation specification makes this drill a direct match for the LH spindle positions on multi-spindle CNC boring machines and boring centers - pairing it with the equivalent right-hand version covers symmetrical panel layouts without compromise.
- The combination of negatively ground spurs and a precision carbide head means blind holes come out clean on both the entry face and the bore wall - reducing sanding and rework in high-throughput furniture and cabinet production.
- P.T.F.E. spiral coating keeps the flutes clear of resin and adhesive residue during extended runs on chipboard, MDF, coated panels, and laminates - materials known for loading up standard uncoated drill flutes quickly.
- The 10 x 27mm parallel shank with driving flat and adjusting screw locks accurately into standard boring machine collets and adapters, making depth setup fast and repeatable across large production batches.
Specifications
- Manufacturer Part Number: 310.060.12
- Brand: CMT Orange Tools
- Diameter: 6mm
- Cutting Height: 27mm
- Total Length: 57.5mm
- Shank: 10 x 27mm (parallel shank with driving flat and length adjusting screw)
- Rotation: Left-Hand (LH)
- Number of Flutes: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Number of Cutting Edges: 2 (Z2)
- Blade Material: Tungsten Carbide (HW)
- Body Material: Super-strength steel
- Coating: P.T.F.E. on spiral portion
- Series: Short Series
Approved Applications
- Blind hole drilling for dowel connections in panel and solid wood furniture
- Panel drilling in cabinet making and furniture manufacturing
- Multi-spindle CNC boring machine operations
- CNC boring center panel processing
- Boring machine operations with adapter or chuck
- Drilling in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
Frequently Asked Questions
What is the difference between the LH and RH versions of this dowel drill, and why does rotation direction matter?
Left-hand (LH) rotation means the drill spins counter-clockwise when viewed from the shank end. Multi-spindle boring machines use both left-hand and right-hand spindles arranged symmetrically so that paired drills rotate toward each other. Using the correct rotation direction for each spindle position ensures the spurs and cutting edges engage the material in the intended direction, producing clean bore walls. Using an LH drill on an RH spindle - or vice versa - would cause the tool to cut on its back faces, resulting in torn holes and rapid edge failure.
What does the length adjusting screw on the shank do?
The parallel shank includes a driving flat and a length adjusting screw that allows the operator to fine-tune how far the drill protrudes from the boring head collet. This makes it straightforward to set a consistent and repeatable blind hole depth across every spindle in a multi-spindle boring machine, which is essential for producing uniform dowel hole depths throughout a production batch.
Why are the spurs negatively ground on this dowel drill?
Negatively ground spurs are angled to score and sever wood fibers cleanly at the outer edge of the hole before the main cutting edges remove material from the center. This shearing action at the perimeter is what produces smooth bore walls and a clean hole entry without roughness or tearout - particularly important when drilling chipboard, laminates, and coated panels where a ragged entry face would be visible in the finished furniture panel.
Is the P.T.F.E. coating on the spiral relevant when drilling MDF or chipboard?
Yes. MDF and chipboard contain resins and adhesive binders that can load up drill flutes during repeated production cycles, increasing friction, heat, and the force needed to clear chips. The P.T.F.E. coating on the spiral portion of this drill provides a low-friction surface that resists adhesion of pitch, resin, and adhesive residue, helping maintain consistent chip evacuation and reducing the frequency of cleaning stops during high-volume panel drilling runs.
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