Re: rolled ball screws

Ball screws and roller bearings have a finite life. How thier loaded
predicts thier lifespan.go to http://www.nookindustries.com read thru
the catalog pages and thier you will find the formulas needed to
determine life.
--mark





--- In CAD_CAM_EDM_DRO@yahoogroups.com, "tsalaff <tacman@s...>"
<tacman@s...> wrote:

> Hi,
>
> I am in the process of building a small CNC mill and would like to

use

> rolled, preloaded ball screws and nuts. The cost of these rolled
> components is not much higher than Acme screws and nuts. The ball
> screws are preloaded by placing larger balls than usual in the nuts

to

> take up any slack.
>
> Does anyone here have any experience with these types of components?
> How well do they maintain zero-backlash over time? How long does it
> take to break them in? Reliability?
>
> Thanks
>
> Steve