I have a very old twist drill for steel, 1 and 23/32 inches in diameter. On two inches of length, the shank is a tapered square 7/8 to 1/2 inch and no center support on the end face like to use with a tailstock dead center. The shank is too big for any of my brace and bit type hand braces or even my old, post drill press.
- I was wondering if anybody could/would elaborate on it.
- I figure it was originally for blacksmithing work. But I was also wondering before Jacobs or the currently typical various sizes tapered tanged shanks, was there a female mating tapered square type chuck to mate the drill shank?
- "Whitman" is the name on the logo.
- Wife's grandfather was a machinist, WW I vet era and I found a few big drills like this in his collection probably jury rigged for lathe work.
- This drill must have fit an even bigger post drill press chuck than what I have. I was thinking of turning the shank down concentric to use in a Jacobs chuck, but it is too big of a diameter for my 4 jaw chuck through its body, unless I bore out the chuck.
- Thanks for any replies,
--+- Kurt