If you are building a system by using a stepper motor and want to take a look at the selection of stepper motor power supplies, the best place to look for them is StepperOnline. You can get bipolar stepper motor drivers from us that will give high performance and output when you use them. You can use the High Torque Nema 23 CNC Stepper Motor that is considered to be the strongest model as it has a 1.8°step angle. Each phase draws 4.2A, allowing for a holding torque of 3.0 Nm(425oz.in). Log onto our website today to make your purchase.