... , over 50% of our motors are utilized as part of a custom module or assembly. SKC manufactures stepper motors in ... a wide range of Nema sizes (11, 14, 16, 17, 23, ... °, 1.8°, 3.6°, 3.75° and 11.25°) and a large spectrum of torque outputs as well.SST39C SERIES MODELSTEP ...