Product Description
CMT 311.045.11 Dowel Drill 4.5 x 35 x 70mm RH by CMT is a precision-engineered, right-hand rotation dowel boring bit designed for clean, accurate blind-hole drilling in panel processing and furniture manufacturing applications. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this 4.5mm diameter drill delivers the consistent bore quality required for dowel joinery in solid wood, chipboard, MDF, and coated panel materials. The spiral portion carries a P.T.F.E. coating that resists pitch and adhesive buildup, keeping the flutes clear during high-volume production runs.
Key Features
- HW (Tungsten Carbide) Cutting Head - hard carbide material maintains a sharp cutting edge far longer than standard steel, reducing retooling frequency in demanding panel drilling operations.
- 2 Precision-Ground Cutting Edges - dual HW cutting edges work together to produce flat-bottomed blind holes with consistent diameter, critical for accurately fitting dowel pins and connectors.
- 2 Negatively Ground Spurs (V2) - negatively sharpened spurs score the panel surface cleanly before the main cutting edges engage, preventing tear-out on laminates, coated boards, and veneered panels.
- P.T.F.E.-Coated Spiral Flutes - the orange or black P.T.F.E. coating on the spiral portion reduces friction and prevents pitch or glue from sticking, extending tool life and maintaining bore quality over repeated use.
- Precision-Balanced Centre Point - the precision-balanced centre point locates the drill accurately on the workpiece with each plunge, ensuring hole placement consistency across multi-spindle and CNC boring operations.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 30mm parallel shank includes a driving flat and length adjusting screw for secure, slip-free seating in boring machine chucks and multi-spindle heads, with straightforward depth setting.
- 2 Spiral Flutes - dual flutes provide efficient chip evacuation from the bore, reducing heat buildup and keeping the cutting zone clear for a cleaner finished hole.
- Right-Hand (RH) Rotation - standard right-hand rotation is compatible with the vast majority of CNC boring centers and multi-spindle boring machines used in panel and cabinet production.
Why This Product
- The 4.5mm diameter and 35mm cutting height make this drill specifically suited to blind-hole dowel connections where precise depth control is needed - the length adjusting screw on the shank lets operators set depth quickly and repeat it reliably across a production run.
- The combination of negatively ground spurs and an HW carbide head means this bit handles laminated, coated, and veneered panels without chipping the surface face - a common problem with lower-quality boring bits that lack precision-ground spurs.
- At 70mm overall length with a 10 x 30mm shank, this long-series drill reaches boring depths that standard short-series bits cannot, opening up applications in thicker panel stacks and multi-row drilling setups on CNC boring centers.
- The P.T.F.E.-coated flutes reduce the cleaning and maintenance cycles needed during glue-up and assembly operations, keeping production moving with fewer interruptions for bit cleaning.
Specifications
- Manufacturer Part Number: 311.045.11
- Brand: CMT Orange Tools
- Diameter: 4.5mm
- 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 Teeth: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Coating: P.T.F.E. on spiral portion (orange or black)
Approved Applications
- Blind-hole dowel connection drilling in furniture panels
- Cabinet making and casework panel boring
- Flat-panel processing on CNC boring centers
- Multi-spindle boring machine operations
- Drilling in chipboard, MDF, HDF, solid hardwood, softwood, plywood, laminates, and coated panels
Frequently Asked Questions
What type of shank 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 a length adjusting screw. The driving flat ensures a positive, slip-free drive connection in boring machine chucks and multi-spindle heads that accept this shank size. The length adjusting screw allows depth to be set precisely without additional tooling.
What is the difference between negatively ground spurs and standard spurs, and why does it matter?
Negatively ground spurs are sharpened at a negative angle that scores the panel surface cleanly before the main cutting edges advance into the material. This shearing action is especially important when drilling laminated boards, coated panels, or veneered surfaces, where positively ground or unground spurs can lift and chip the face layer around the bore entry.
What does the P.T.F.E. coating on the spiral do during drilling?
The P.T.F.E. coating on the spiral portion reduces friction between the drill and the bore wall. It also prevents pitch from wood resins and adhesive residue from bonding to the flute surface. This keeps the flutes clear during continuous use, maintains consistent chip evacuation, and extends the working life of the drill before resharpening or replacement is needed.
Is this dowel drill suitable for use with plastics and laminate materials?
Yes. The HW (tungsten carbide) cutting head, precision-ground negatively set spurs, and P.T.F.E.-coated flutes make this drill well suited for use in plastics and laminates, in addition to solid wood, chipboard, MDF, and coated panels. The carbide head retains its edge in abrasive composite and synthetic panel materials where standard steel bits wear rapidly.
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