On Sat, 23 Feb 2008 22:20:22 +0000, Michael Gray wrote:
I have a Cummins 7x12 minilathe and a nicely hand-ground Acme profile tool
I made. Right, so I have to cut a worm at 6.4 tpi. the change gears with
my 16 tpi leadscrew will be:
Thanks to all for the helpful comments.
I've got it sorted now and found the following sites of help:
http://www.lathes.co.uk/latheparts/page14.html
I d/l NthreadsP.exe from lathes.co.uk and found it ran well by way of Wine
on my linux (Ubuntu) box.
http://www.gizmology.net/changegears.htm
http://www.littlemachineshop.com/Ref...ange_gears.php
http://www.varmintal.com/alath.htm#Cutting_Odd_Threads
http://www.mini-lathe.org.uk/thread_...ge_gears.shtml
good explanation of what you're trying to accomplish with your change
gears.
On some of these you can put in the data and a server programme will sort
out the change gears for you (very handy), some let you d/l a programme so
that you can "do it at home". I found that many of the programmes
wouldn't run under Wine on linux, but they probably would be very
comfortable under Windoze. Do check out NthreadP on the lathes.co.uk
site, quite nifty I'd say.
HTH,
Mike in BC