- Joined
- Jul 26, 2011
- Messages
- 4,142
Yesterday I began a new pump drill for a friend who is a craftsman in the historic area in Williamsburg. I make the 1/8" shank spade point drills also. The noses of these drills have a tapered thread,which I used to make by slowly backing up the cross slide while cutting the thread. The lathe I used then was slower. My Hardinge HLVH goes too fast to do that easily,but I like the Hardinge so much,I didn't bother to do the threads in my large lathe which will do 30 RPM. Should have,though. I did manage to finally taper the thread cut. I have OLD threading combs that I can run over the threads with and smooth them out. thread combs were used years ago to freehand cut threads by learning to move the comb at just the right speed BY HAND to cut threads on a non thread cutting lathe.
These drills were scanned off slides I made years ago. I used to get paid to give slide lectures,so I made slides instead of pictures.
I enjoyed making fancy moldings and other nice details. Most pump drills were very plain.
These drills were scanned off slides I made years ago. I used to get paid to give slide lectures,so I made slides instead of pictures.
I enjoyed making fancy moldings and other nice details. Most pump drills were very plain.