1.68A 0.44N.m 42mm Frame17 Hybrid Bipolar Stepper Motor

Bipolar stepper motors

These motors usually have 4 wires, but may have 8 wires for very powerful motors. In these motors, current can flow either direction through the coils, and all coils can be activated at the same time. This means bipolar motors can be very strong and fast. Some people point out that this means the control circuitry needs to be more complicated, but stepper motor drivers are cheap and simple to use, so circuit complexity should not be a big factor in your decision. Again, bipolar motors are faster, stronger, more weight efficient, and similar in price to unipolar motors. The only disadvantage is that these motors can require a lot of power, which means you might need a beefy supply if you want to run the motors at a high voltage for faster speeds