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Half-round drills.... uses for?

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  • #16
    The "Half round" bits such as sold by Traver's Tools, Page 22 of their 2005 catalogue, are not "D" Bits as "D" Bits are flat on the end and used for finishing previously drilled holes, especially when one has to have a flat bottom, while half round bits are pointed.

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    • #17
      J.

      We are going through a find on Model Engineer archive index.
      Might I suggest that you have a look at the Novices Corner from 30 th November 1950 for more on D Bits.

      My memory is better than I thought!

      Kind whatsits from

      Norm

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