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The Dümmel Ultramini tool-line is a must for turning smallest bores. The inside bore machining of small diameters has always been difficult and it is not easy to obtain the ideal tool. The Ultramini tool-line covers more than 1.000 different standard inserts which could be clamped in only two toolholders. Of course the complete Ultramini program is available on stock.


  • General description

  • Cutting data for grooving standard values for cutting speeds

  • Technical information and general standard values for threading

  • Grades summary

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