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Every stepper motor has a stator and rotor ... they are not a great choice for low-power applications, or where high load torque is a requirement. In the case of the 28BYJ-48 which we looked ...

Like other PCB motors it produces very little torque, roughly 2% of a typical NEMA17 stepper motor. Even so, the engineering behind this project remains impressive.

The MINIPULS 3 peristaltic pump combines microprocessor speed control with a high-torque stepper motor. Chemical-resistant pump heads, equipped with 10 stainless steel rollers, set the performance ...