What sounds more cost effective:
Another mini-mill for threading tasks
modify the eldorado to allow 'real' threading (not that guess where you start and keep guessing each pass nonsense).
My unit has DRO, but am weary of even attempting to learn the 'shoptask threading method' if it could be overcome in the gearbox somehow.
Are there any current bolt on options for a threading dial/half nuts?
Last edited by pfarber; 05-05-2010 at 10:43 PM.
I really don't want to learn a s specific threading procedure for a machine that by most accounts can be difficult to thread with (I'm talking shoulders specifically).
Then there is the issue of the 'manual' doesn't give more than a cursory explanation of of the 'shoptask way'... and I don't want to crash the tool post into the head and simply say 'well I learned that was bad'.
Are there videos? Step by step guides?
I've used the lathe for a number of boring and other projects, but only recently have I had any interest in threading with it.
1. Figure out what you've got or
2. Buy something else.
If you are not versed in threading, then you will still have a lot to learn even if you buy a traditional lathe with 1/2 nut design.
Threading on a lathe is one of those operations usually restricted to the most experienced machinists in a shop because it requires a lot of practice.
There is a book called " Screwcutting in the lathe" by Martin Cleeve which is very good in explaining the principles involved.
Interestingly, the very first words in the introduction read;
" It has been said that screwcutting cannot be taught from books--"
Cutting a thread right up to a shoulder is not an easy task on any machine. I would suggest you try the method of threading away from the shoulder. Grab some scrap material and practice until you think you are ready to try on your project.
Thanks all for your input.