Inspired by this http://www.thingiverse.com/thing:3981 and this http://www.thingiverse.com/thing:5584One of the first things I would like to print when I finish my Mendel is a roller bearing. I am also playing around with OpenSCAD so I have started writing a script to generated either complete printable bearings or just the races with an optional ball cage.The end result I would like is a lookup table of common bearing sizes, or size to suit.The script is parametric, but has no error catching so don't try and generate a file with an ID larger than the OD for instance.OD - Outside diameter ID - Inside diameter B - Thickness cage - Draw a cage to hold the balls (yes/no) balls -Draw the balls (yes/no) calc_no_balls - Calculate the number of balls (yes/no) ball_num_overide - Manual number of balls if above = NO