3D printed flat bearing for 3D printer spool (need 30x 8mmØ steel balls + 6 rubber feets)
grabcad
takes a bit over 10h to fully print and assemble, cost a bit over 2€ (if you make 13 of them, otherwise 1 alone is 11€), and work very well (at least the one i printed) you will need : http://www.amazon.fr/gp/product/B00RK57NUS?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00 http://www.amazon.fr/gp/product/B00H8UU3R0?psc=1&redirect=true&ref_=oh_aui_detailpage_o04_s00 time and cost in a spreadsheet in the downloaded files i suggest you to test the print of 1 cage before everything, see if the steel ball stay in the cage, and can still roll inside (i found 0,18mm of play to be just right, and that is the dimmension in the files) part of this project : School project adaptation of a professional 3D printer to open source components
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