A hook with a bearing to suspend a basket of plastic to feed a RepRap machine. Full details in my blog: http://hydraraptor.blogspot.com/2008/11/sky-hook.html

Print the plastic parts. Make sure the plastic is hot enough to not de-laminate under tension. You don't want it to drop a few Kg of plastic onto your machine! I recommend 240C for ABS and HDPE. Cut the support membrane out of the large hole in the housing with a penknife.

Thread the barbs through a 608 skate bearing by crossing them over each other. Insert the locking piece and drop the bearing into the housing. Screw it into a ceiling joist.

Note that the close up pictures show a three screw hole housing but the STL file has a two hole version more suitable for ceiling joists.