You can find links to instructions for making D drills on my website here:
or if you just want to cut to the chase:
- D drills (making and using; also known as half-round drill bits)
- : From
- : From
- : From the
- : Popular Science, Oct. 1967?? (Google e-book)
- : From website
--- In 7x12minilathe@..., "CLevinski" wrote:
>
> Mert,
>
> I've been fascinated by the idea of D drills for metal ever since I
> first saw a photo of one. I guess the ability to make whatever you need
> (by turning the raw stock to the proper diameter and hardening before
> grinding) just seems so useful! Are you aware of instructions for
> making them online anywhere, or are your instructions for Rick's tiny
> bit scale-able? And is there a size range where then work best?
>
> Thanks to you and anyone else for any input!
>
