RE: [CAD_CAM_EDM_DRO] General machine discussion, was Bent Nookballscrews ?????

This has been a great thread for me - I have learned a lot.
As regards to the comments below, here is one example from a Hiwin Ballscrew
manual someone posted a link for yesterday:

"Single nut preloading:

There are two ways of preloading a single
nut. One is called "the oversized-ball
preloading method". The method is to insert
balls slightly larger than the ball groove space
(oversized balls) to allow balls to contact at
four points (Fig. 5.7).
Fig. 5.7 : Preload by ballsize."

> Ballendo wrote:
>
> P.S. FWIW, loading ballnuts with oversize balls to create a negative
> clearance IS something the ball screw and nut mfrs. HAVE been doing
> for decades...

Kim Lux wrote:

If that were the case, then there would be no reason for a two nut zero
backlash ball system.