I got mine all machined to 25mm.

Quote Originally Posted by 2e0poz View Post
Lengthen the screw is not that hard if you access to lathe.
That'll be my lathe then.

I've done that before to add a handle to lathe leadscrew - drilled & reamed a hole in the end then machined a bar to fit. Put a straight knurl on the bar to make it grip, loctite and big hammer to 'press fit' it. Start by machining the bar slightly oversize, then after put the ballscrew in lathe, get it on centre and skim the bar the right size so that it is on centre.

Can't the whole screw be moved along and the bearing mount on the non driven end be moved?