Internet Horology Club 185
Waltham #1 threads/screws

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/3426047761/m/8941025202

January 24, 2006, 12:34
Jerry Van
Waltham #1 threads/screws
I need to produce several, small, thumbscrews with a Waltham #1 thread, (.0598 X 110). Can anyone tell me how to produce this thread? I believe Elgin had a very similar size as well, (.0591 X 110). My lathe will only get as close as a 112 pitch. Please help.