Product Description
CMT 308.050.11 Dowel Drill - 5 x 30 x 57.5mm, Right-Hand Rotation is a precision-engineered carbide-tipped boring tool from CMT, built for blind hole drilling in furniture manufacturing, cabinet making, and panel processing applications. This short-series dowel drill delivers clean, flat-bottom holes with consistent bore quality in solid wood, chipboard, MDF, HDF, laminates, and coated panels - making it a go-to choice for dowel joinery and high-volume panel drilling on CNC boring machines and multi-spindle boring centers.
Key Features
- Tungsten Carbide (HW) Cutting Head - the hard-metal tipped construction maintains a sharp, durable cutting edge through repeated use in abrasive materials like chipboard, MDF, and laminates, reducing the frequency of tool changes and downtime.
- 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide cutting edges produce clean, flat-bottom blind holes with tight tolerances, which is essential for accurate dowel insertion and strong furniture joints.
- 2 Negatively Ground Spurs (V2) - the negatively sharpened spurs score the material cleanly at the perimeter of the bore before the cutters engage, eliminating tearout and leaving smooth bore walls even in veneered or laminated panels.
- 4 Spiral Flutes - four chip-evacuation flutes pull waste material up and out of the hole efficiently, preventing clogging and reducing heat buildup that could otherwise affect hole quality or shorten tool life.
- PTFE Cutter Coating (Black or Orange) - the polytetrafluoroethylene coating on the spiral portion prevents pitch and adhesive buildup, keeping the tool running smoothly and extending service life in glue-adjacent operations.
- Precision Balanced Centre Point - the balanced centre point ensures accurate hole placement at the start of each bore, reducing wander and maintaining positional accuracy across repeated drilling cycles.
- 10 x 20mm Parallel Shank with Driving Flat and Length Adjusting Screw - the standardized shank format with driving flat provides positive rotational drive without slippage, and the length adjusting screw allows precise depth setting in boring machine chucks and adapters.
- Super-Strength Steel Body - the steel shank and body absorb vibration and resist deflection during high-cycle boring, contributing to consistent hole geometry over the tool's service life.
- Right-Hand (RH) Rotation - matched to the standard spindle direction of the vast majority of CNC boring centers and multi-spindle machines, ensuring direct compatibility without special machine configuration.
Why This Product
- The combination of negatively ground spurs and precision carbide cutting edges means this drill produces clean entry and flat-bottom holes in delicate laminated and coated panels - exactly the quality requirement for visible furniture components where tearout is unacceptable.
- At a 57.5mm total length with a 30mm cutting height, this short-series format is sized for compact multi-spindle boring heads where clearance between spindles is limited, making it a practical choice for high-density CNC boring applications.
- The PTFE spiral coating actively resists pitch and glue accumulation, which is a real operational advantage in cabinet and furniture production lines where panel adhesives and wood resins can quickly foul uncoated boring tools.
- The 10 x 20mm parallel shank with driving flat and length adjusting screw offers secure, repeatable seating in boring machine chucks - reducing setup time and maintaining consistent drilling depth across long production runs.
Specifications
- Manufacturer Part Number: 308.050.11
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 5mm
- Cutting Height: 30mm
- Total Length: 57.5mm
- Shank: 10 x 20mm parallel shank with driving flat and length adjusting screw
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Number of Flutes: 4
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Cutter Coating: Black or Orange P.T.F.E.
Approved Applications
- Blind hole drilling for dowel connections and dowel joinery
- Panel drilling in furniture and cabinet manufacturing
- High-volume boring on CNC boring centers and multi-spindle boring machines
- Panel processing in woodworking production lines
- Boring in solid wood, chipboard, MDF, HDF, plywood, laminates, and coated panels
Frequently Asked Questions
What machines is this dowel drill compatible with?
This drill is designed for use with multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines equipped with an adapter or chuck that accepts a 10 x 20mm parallel shank with driving flat.
What is the difference between negatively ground spurs and standard spurs?
Negatively ground spurs are angled to score and sever the material fibers at the outer edge of the bore before the main cutters remove the core. This produces cleaner bore walls and sharper hole perimeters, which is especially important when drilling veneered, laminated, or coated panels where tearout at the surface would be visible in the finished product.
What does the PTFE coating on the spiral flutes do?
The P.T.F.E. (polytetrafluoroethylene) coating applied to the cutter portion of the spiral acts as a non-stick barrier that prevents pitch, resin, and adhesive from bonding to the flute surfaces. This keeps chip evacuation efficient and reduces the cleaning and maintenance burden during extended production runs.
Why does this drill have 4 flutes if it only has 2 cutting edges?
The 4 spiral flutes are dedicated chip evacuation channels that carry waste material up and out of the blind hole as drilling progresses. The 2 HW cutting edges (Z2) do the actual cutting work, while the additional flute geometry helps prevent chip packing and heat buildup inside the bore - both of which can degrade hole quality and shorten tool life.
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