Summary Ok I had some bearing from burned or crashed drone motor, so I modeled this little tri spinner frame for printing. Its as small as a 2 euro cent, so pretty small. The bearing dimensions are for if you like to make this as a key hanger or so.... 4mm thick - 3mm ID - 8mm OD. Bearings type is SMR693C-YZZ Print Settings Printer: Delta Kossel XL Rafts: No Supports: No Resolution: 0.1 Infill: 65% Post-Printing