GT3 Pulley

grabcad

This are models for 2:1 , 3:1 ratio on closed belt so if you use one pully of 20tooth they can match with these for speed or torque propurses, theres models for sla printing and for resing printing each one are desingned to get more streng acorrding they printing metodth.The ones for SLA are those with holes or car wheel type, you will have more strength seting your slicer to 0.2 layer heigth and 0.8 shell ticknes make sure to set to 3-4 the wall line count that means that the model has reinforcements of 2.4mm (3 layers of 0.8mm leaving less space for infill an more for pure plastic)