Product Description
CMT Dowel Drill 5 x 43 x 70mm Right-Hand is a precision-engineered carbide-tipped boring tool built for dowel joinery in furniture manufacturing, cabinet making, and panel processing. With a 5mm cutting diameter, 43mm cutting height, and 70mm overall length, this long-series dowel drill reaches the depth needed for blind dowel holes in thicker panel stock - including chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels. The tungsten carbide (HW) cutting head, PTFE-coated cutter body, and 4-flute spiral design make this a high-performance tool for multi-spindle CNC boring machines, CNC boring centers, and panel processing equipment.
Key Features
- HW (Tungsten Carbide) Cutting Head: hardmetal construction delivers long-lasting edge retention compared to standard steel, reducing regrind frequency in high-volume panel operations.
- 2 Precision-Ground Cutting Edges (Z2): dual carbide cutting edges produce clean, accurate bore diameters and flat-bottom holes essential for tight-fitting dowel joints.
- 2 Negatively Ground Spurs (V2): the negative grind geometry scores the panel surface cleanly before cutting begins, preventing tearout on chipboard, laminates, and coated panel faces.
- 4 Spiral Flutes: four chip-evacuation channels clear debris efficiently during drilling, reducing heat buildup and keeping the bore wall clean - especially important in MDF and dense chipboard.
- PTFE Coating on Cutter Portion: the black or orange PTFE coating resists pitch and adhesive buildup on the flutes, maintaining consistent chip flow and extending the working life of the tool between cleanings.
- Super-Strength Steel Body: the high-grade steel shank and body resist flex under load, maintaining concentricity during high-speed spindle operation for repeatable hole placement.
- Parallel Shank with Driving Flat and Length Adjusting Screw: the 10 x 20mm shank seats positively in multi-spindle boring heads, with the driving flat preventing rotation and the adjusting screw allowing precise depth setting without disassembly.
- Precision-Balanced Centre Point: the HW centre point self-registers on the panel surface before the cutting edges engage, eliminating bit walk and ensuring accurate hole positioning on every cycle.
- Right-Hand Rotation (RH): compatible with standard right-hand spindle boring machines and CNC boring centers without any spindle direction changeover.
- 70mm Overall Length - Long Series: the extended body length allows boring of deeper blind holes in thicker panel configurations where standard-length drills cannot reach full depth.
Why This Product
- The negatively ground spur geometry combined with the HW cutting edges addresses one of the most common problems in panel boring - surface tearout on laminates and coated boards - delivering clean entry holes that require no secondary sanding or filling before assembly.
- The 4-flute spiral design, paired with PTFE coating, keeps chip evacuation active throughout the cut, which matters most in continuous production environments where resin-rich MDF and adhesive-backed panels quickly load conventional drills.
- At 70mm total length with a 43mm cutting height, this drill accommodates thicker panel stock that would be unreachable with a standard-series dowel drill, making it the appropriate choice when blind-hole depth requirements exceed what shorter tools can achieve.
- The 10 x 20mm parallel shank with a driving flat and length adjusting screw provides direct, secure mounting in multi-spindle boring heads without adapter sleeves, simplifying setup and maintaining concentricity for repeatable dowel alignment across large production runs.
Specifications
- Manufacturer Part Number: 309.050.11
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 5mm
- Cutting Height: 43mm
- Total Length: 70mm
- Shank: 10 x 20mm parallel shank with driving flat and length adjusting screw
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Number of Flutes: 4
- Spur Sharpening: Negatively ground spurs
- Rotation: Right-hand (RH)
- Blade Material: HW (Tungsten Carbide)
- Cutter Coating: Black or orange PTFE
- Body Material: Super-strength steel
Approved Applications
- Drilling blind holes for dowel connections
- Panel drilling in furniture manufacturing
- Cabinet making and case construction
- Boring operations in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
- Use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers
- Use in boring machines with an appropriate adapter or chuck accepting a 10 x 20mm parallel shank
Frequently Asked Questions
What is the difference between the negatively ground spurs and a standard spur grind?
A negatively ground spur angles the scoring edge so that it shears the panel surface fiber cleanly before the main cutting edges remove material. This geometry is specifically designed to minimize tearout on laminates, coated panels, and chipboard faces - materials where a standard positive-grind spur can lift or chip the decorative surface rather than slicing through it cleanly.
Why does this dowel drill have 4 flutes if it only has 2 cutting edges?
The 2 cutting edges (Z2) define how many carbide tips engage the workpiece simultaneously, controlling cutting force and edge geometry. The 4 spiral flutes are separate chip-evacuation channels that carry swarf up and out of the bore regardless of how many edges are cutting. More flutes mean more pathways for debris removal, which is especially valuable in fine-particle materials like MDF where dust can pack into a bore and cause heat buildup or hole-size inconsistency.
What does the PTFE coating on the cutter portion do during use?
PTFE has a very low coefficient of friction and resists adhesion. On a dowel drill operating in resin-bonded panel materials, pitch and glue from the substrate would otherwise build up on the flute faces, reducing chip clearance and increasing cutting resistance. The PTFE coating prevents that buildup, keeping the flutes clear and maintaining consistent performance over longer runs between tool cleaning.
How does the length adjusting screw on the shank work?
The 10 x 20mm parallel shank includes a length adjusting screw that allows the drill's axial position to be set precisely within the boring head spindle. This means the operator can calibrate the exact blind-hole depth without changing spindle stop settings on the machine - particularly useful when switching between panel thicknesses or dowel depth specifications on a multi-spindle boring center.
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