In designing an CNC conversion for my milling machine, I was having a hard time finding quality documentation on the super-cheap ballscrews that are prevalent on ebay (such as those sold by the user linearmotion2008). Some of the ebay listings have snippets of documentation, but they are scans of scans of copies of...
I finally ran across a site that has original quality documentation:
which I got to through:
The automation4less.com site also has pointers to 3D STEP models of the ballscrew parts.