Direct Drive 608z bearing fit
This is the rod spacer for the nice direct drive here: http://www.thingiverse.com/thing:189742.
This spacer holds bigger bearings (608z), in case you don't have any small ones used in the original rod spacer or you want to ged rid of the aluminium stopper plate and use normal washers instead.
Scale down to X = 35mm or Z =16mm before printing.