CMT Carbide Dowel Boring Bits


CMT Carbide Dowel Boring Bits


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Supplier: CMT

CMT in Italy manufacture a dominant amount of the world’s carbide spur tipped boring bits under the CMT brand and many others. Available in both Right Hand and Left Hand rotation these bits come in various diameters and two different lengths. The 57.5 mm bits are primarily used on line bore and construction bore machines and the 70 mm length bits for CNC router and drilling head applications. Simply choose the diameter, rotation and length you need.

These dowel drills are entirely made of premium quality super micro-grain carbide from Luxemburg.


  • The unique tip has curved, negatively ground spurs to produce exceptionally clear bores with no rough edges. Centre point balanced.
  • The cylindrical head is bigger than traditional tips and is extremely resistant to prolonged use.
  • The plunge edge runs all the way to the centre of the bit to reduce drilling resistance and increase production speed. It lasts longer between sharpening’s.
  • Ideal for hardwood and difficult composites such as particle boards, MDF and veneered wood.TECHNICAL DETAILS:
  • Super-Strength Steel;
  • Spiral Flutes Coated with P.T.F.E. (Black on R.H. Rotation…Orange on L.H. Rotation)
  • HWM Head with Precision Balanced Centre Point;
  • Two HW Precision Ground Cutting edges (Z2);
  • Two Negatively Ground Spurs (V2);
  • Two Spiral Flutes on 57.5mm Length;
  • Four Spiral Flutes on 70 Length
  • 10mm Shank
  • Diameter: 5mm or 8mm (Other Diameters are Custom Order)
  • Cutting length: 27mm on 57.5mm
  • Cutting Length: 43mm on 70mm
  • Total Length: 57.5mm or 70mm
  • Right-Hand or Left-Hand Rotation:
Select Model

5/16'' D; LH; 57.7mm L, 5/16'' D; RH; 57.7mm L, 5mm D; LH; 57.7mm L, 5mm D; RH; 57.7mm L, 5/16'' D; LH; 70mm L, 5/16'' D; RH; 70mm L, 5mm D; LH; 70mm L, 5mm D; RH; 70mm L