Trying to print 608 ball bearings on a 3D printer? Think again. Try this 3D printer optimized design that uses a train wheel style approach using the principles of FDM 3D printing as the design guide. This print in place bearing takes approximately 17 minutes to print and is ready to spin about 2 minutes after printing. It needs to be broken in to remove blemishes in the print by spinning the bearing on a grippy surface. Make sure to print this in 0.2mm/0.1mm/0.5mm.