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280vs cross slide feed nut
Posted: Tue 25 Jan , 2011 16:05 pm
by Rocboni
Hi
Can anybody tell me the correct thread size for my lathe? is it 1/2" x 10TPI right or left hand?
Thanks
Re: 280vs cross slide feed nut
Posted: Wed 26 Jan , 2011 17:05 pm
by Pete.
On your metric lathe, it's 1/2" diameter x 2.5mm pitch left hand modified square section thread. As far as I can tell this like a square thread but with a 10 degree flank angle.
Drawings here: EDIT - wrong drawing. That one is for a 5mm pitch, you want a 2.5mm pitch nut.
ML100-512D is the drawing you need, it's about here somewhere. Here's a gif of the nut.
Re: 280vs cross slide feed nut
Posted: Wed 26 Jan , 2011 17:23 pm
by Pete.
Here's the drawing:
viewtopic.php?t=1922
How lucky are we to have these great folks at Denford who are willing to put themselves out for no gain to help by scanning drawings for our machines? I know a lot of it is gone now in the premises move but all the same I think we should be very grateful for what we get!
Re: 280vs cross slide feed nut
Posted: Wed 26 Jan , 2011 17:35 pm
by Rocboni
whats the best way of going about making one?
Re: 280vs cross slide feed nut
Posted: Wed 26 Jan , 2011 18:00 pm
by Pete.
I made mine from delrin, following this method:
viewtopic.php?f=4&t=3034
It was tight at the ends of travel at first, but now it works like a charm and has no back-lash.