Impossible to find the change gears for some threads on my WM250 Lathe. Good lathe but poor threading info.
So I wrote a change gear calculator. Probably buggy, but seems to work OK for me. Windows 10 64bit, or Windows 32bit compatible with Windows 7/XP . No installation, just create a directory and extract the exe file into it. It does write a gears text file which can be updated in the program or via Notepad etc.
Hope someone finds it useful.
Best Regards
picclock