THe link to the double ball nuts is here
http://www.slidesandballscrews.com/pdf/35-36.pdf
the ball nuts i have in stock are pre loaded to give a max backlash of 20 micron.
If you want a zero backlash nut, this will need to matched to the ball screw at the factory.

Quote Originally Posted by Robin Hewitt View Post
Sounds promising, I'd probably only need to lengthen the ends a bit, maybe deepen the circlip groove a tadge. A couple of flat spots would be handy.

Can I find the dimensions and details for the double nuts on your website? They seem to be hidden under pre-machined screws, so when you click for info you get told about end machining rather than nuts :confused:

Last time I bought a "zero backlash nut" it was from that other bunch. Turned out I had to crush it sideways. A bit tricky when it's buried under a milling table