Disclaimer: Due to the recent incidents (things appearing on ebay) I just want to make something very clear: I do not allow any commercial use of my STL-files, my designs and my photos!Description: Oh no, not again another ball bearing... Sorry, but I just have to show my final design. jonathanw's comment on my last ball bearing ( http://www.thingiverse.com/thing:57762 ) gave me new ideas. I reduced the bearing to three parts. The inner ring is now made of one piece and need not to be snapped together. Unfortunately the assembly is a little bit more complicated. I made a simple assembly tool that makes things easier. Take a look at this video for the assembly sequence: http://www.youtube.com/watch?v=P5VLo87xurM PS: Thanks jonathanw for leading me to a new idea!Print all parts (layer height schould be 0.1mm) Assemble like seen in the video