Lathe cross slide conversion to a ball screw

[tonyfoale]

I just checked at Thompson; they list a 5/8"LH w/ 0.2 lead, 6' long [https://www.thomsonlinear.com/en/product/190-9099]
The nut [https://www.thomsonlinear.com/en/product/8106-448-037] needs a screw-on flange [https://www.thomsonlinear.com/en/product/8105-448-002]. You'd have to machine the shaft to fit, and I haven't researched the fixed & floating bearing options.

Many thanks for that. BTW your links returned "product not found" responses but if I copied and pasted the PNs from your links in their search box it had no problem finding them. The screw on nut mounting is like I have on the Z axis of my mill, it would have been much easier to fit on the lathe than the flanged nut that I got.