Product Description
The CMT 311.120.11 Dowel Drill - 12 x 35 x 70mm Right-Hand is a precision-engineered 2-flute boring tool built for clean, accurate blind hole drilling in furniture panels, cabinet components, and solid wood assemblies. Designed for use in multi-spindle boring machines and CNC boring centers, this long-series dowel drill delivers flat-bottomed holes with crisp, tear-out-free walls - exactly what demanding dowel joinery and panel processing applications require. The tungsten carbide (HW) cutting head, P.T.F.E.-coated spiral, and precision-balanced centre point combine to make this tool a dependable choice for chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels alike.
Key Features
- HW (tungsten carbide) cutting head bonded to super-strength steel body - delivers long-lasting sharpness and resistance to wear, reducing the frequency of tool changes during high-volume panel boring runs.
- 2 precision-ground HW cutting edges - provide balanced cutting action that produces consistently flat-bottomed blind holes, critical for tight-tolerance dowel joinery in furniture and cabinet manufacturing.
- 2 negatively ground spurs (V2 configuration) - score the material ahead of the cutting edges, resulting in clean bore walls and virtually no tearout on the entry face of chipboard, laminates, and coated panels.
- P.T.F.E. coating on the spiral portion - reduces friction and prevents pitch and glue buildup on the flutes, keeping the tool running cleanly and extending service life between sharpenings.
- Precision-balanced centre point - ensures accurate hole positioning on entry, reducing the risk of drift and keeping hole patterns within tight tolerances on multi-spindle boring equipment.
- 2 spiral flutes - efficiently evacuate chips and dust from the bore during drilling, preventing packing that could cause burning or hole distortion in MDF and dense composites.
- Parallel shank with driving flat and length adjusting screw - provides a secure, slip-free seating in machine chucks and spindle holders, and allows precise depth setting without additional tooling.
- Right-hand (RH) rotation - matches the standard spindle direction of the vast majority of CNC boring centers and multi-spindle boring machines, ensuring straightforward drop-in compatibility.
Why This Product
- The long-series 70mm overall length with a 35mm cutting height makes this dowel drill suited for deeper blind bore requirements that shorter-series tools cannot reach, giving woodworkers and panel processors more flexibility in joint design without switching tools.
- The combination of negatively ground spurs and a precision-ground HW head addresses one of the most common problems in panel boring - surface tearout on laminates and coated panels - producing furniture-quality holes that need no secondary cleanup.
- The P.T.F.E.-coated spiral directly reduces downtime caused by pitch and adhesive buildup during glued-panel and laminate work, keeping production moving without frequent stoppages for cleaning.
- With a 10 x 30mm parallel shank featuring a driving flat and length adjusting screw, this drill fits securely into standard boring machine spindle holders and allows repeatable depth settings - an important advantage when boring matched hole patterns across large panel batches.
Specifications
- Manufacturer Part Number: 311.120.11
- Brand: CMT Orange Tools
- Diameter: 12mm
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10 x 30mm (parallel shank with driving flat and length adjusting screw)
- Number of Flutes: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Number of Teeth: 2
- Blade Material: HW (tungsten carbide)
- Rotation: Right-hand (RH)
- Spiral Coating: P.T.F.E.
Approved Applications
- Blind hole drilling for dowel connections and panel joinery
- Furniture manufacturing and cabinet making
- Panel processing and flat-panel component boring
- Drilling in solid hardwood and softwood
- Boring in chipboard, MDF, and HDF panels
- Cutting laminates, coated panels, and plywood
- Use in multi-spindle CNC boring machines and panel boring centers
- Use in boring machines with compatible adapters or chucks
Frequently Asked Questions
What shank size does this dowel drill use, and will it fit my boring machine?
This drill uses a 10 x 30mm parallel shank with a driving flat and length adjusting screw. This is a widely used shank format on multi-spindle CNC boring machines and panel boring centers. Confirm that your machine spindle or chuck accepts a 10mm parallel shank before mounting.
Why does this drill have negatively ground spurs, and what benefit does that provide?
Negatively ground spurs are configured to score the material surface just ahead of the main cutting edges as the bit enters the workpiece. This pre-scoring action severs the surface fibers cleanly before the body of the drill passes through, which prevents tearout on laminates, coated panels, and veneered chipboard - materials where a clean entry hole is critical for finished furniture quality.
What does the P.T.F.E. coating on the spiral portion do during operation?
The P.T.F.E. coating applied to the spiral portion of this drill reduces friction between the flute surfaces and the workpiece material. In practical terms, this means pitch, resins, and adhesives are less likely to bond to the spiral and accumulate during boring - particularly relevant when working with glued composites, MDF, and laminated panels. Keeping the flutes clean maintains efficient chip evacuation and extends the usable life of the tool between resharpenings.
Is this a right-hand or left-hand rotation drill, and does it matter for my machine?
This is a right-hand (RH) rotation drill, meaning it is designed to cut when the spindle rotates in the standard clockwise direction when viewed from above. Most CNC boring centers and multi-spindle boring machines run right-hand rotation spindles as their default configuration, so this drill will be the correct choice for the majority of setups. Always confirm your machine's spindle rotation direction before selecting RH or LH tooling.
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