Diamond Micro Drilling

Applying diamond technology developed in stylus production and other areas, Namiki has developed a revolutionary new diamond micro-drill. The drill provides minimum bore diameter machining, perfectly suited to the current era of micro-machining.

Distinguishing Features

  • Bore diameters as small as 0.1mm(100μm)can be attained when machining with the Namiki diamond micro-drill.
  • Conventional machine tools can be employed with the micro-drill. Thus, higher speed, higher precision and lower cost can be obtained than by etching, electric discharge machining, or ultrasound machining.
  • Work can be performed on a wide variety of materials, including ruby, sapphire, glass and ceramics.
  • Since the diamond micro-drill produces exceedingly little friction, multiple-unit, continuous drill machining can be accomplished with limited dispersion of the work material.


  • Machining bore diameter: φ0.1mm and greater
  • Center positioning accuracy: ±3μm(φ0.2)
  • Dispersion from bore diameter: no more than 1μm (at the 100 item point in a continuous drill machining process)
  • Bore depth: no more than 6 mm


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TEL: +81-3-3919-2200
( Mon - Fri / 9 am - 5 pm in Japan )

Fine Hole Processing
Contact Us
TEL: +81-3-3919-2200
( Mon - Fri / 9 am - 5 pm in Japan )

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