I've been looking at this today and my new best-guess is that it's an Acme thread. https://en.wikipedia.org/wiki/Acme_thread_form So the options would be, buy a tap or grind a lathe tool to the correct profile. There's a possibility of using a single point tool to cut the trhead, but I'd probably g...

The handwheel is for moving the cross-slide. The knurled wheel is for zero-ing the dials. You hold the handwheel tight and turn the knurled part to line up 0 with the pointer. On the scale it should tell you the graduations, it will be either 0.001" or 0.02mm. Knowing this will help. hi pete thanks...

The handwheel is for moving the cross-slide. The knurled wheel is for zero-ing the dials. You hold the handwheel tight and turn the knurled part to line up 0 with the pointer. On the scale it should tell you the graduations, it will be either 0.001" or 0.02mm. Knowing this will help. hi pete thanks...

Hi William. The truth of the matter is that I am no longer sure what the heck they have produced for a cross-slide screw. I'm still working on it. My gut feeling is that it's an imperial screw but testing with a dial suggests otherwise. First question is - is your lathe imperial or metric? Does it ...

Pete. wrote:...see above

thanks very much pete that looks like the part i need is the one in the pic for sale or is it being used thanks for you time to reply to me

hi help needed i have a 1980s viceroy 250 lathe and the cross slide brass nut has been lost does any one know where i can buy one or the screw thread used thanks very much

hi help needed i have a 1980s viceroy 250 lathe and the cross slide brass nut has been lost does any one know where i can buy one or the screw thread used thanks very much