This is a companion to the 60 tooth pulley. It fits 3/8" pitch x 1/2" wide type L timing belt and has a 1/4" bore to fit on a NEMA-23 stepper motor.I printed at 20% infill, 0.25mm layers, 3 perimeters and 3 top/bottom layers. I used the same XY scaling in slic3r as I used for the 60 tooth pulley to print this (-0.2mm).Original file is shared at OnShape:https://cad.onshape.com/documents/af97cd41867e4d579929e55a/w/2014cc214160473c9dc80ae0/e/9b2e57a2fd35...