A stepper motor to satisfy all your robotics needs! This 4-wire bipolar stepper has 1.8 per step for smooth motion and a nice holding torque. The motor was specified to have a max current of 350mA so that it could be driven easily with an Adafruit motor shield for Arduino (or other motor driver) and a wall adapter or lead-acid battery.
200 steps per revolution, 1.8 degrees; Coil #1: Red & Yellow wire pair. Coil #2 Green & Brown/Gray wire pair; Bipolar stepper, requires 2 full H-bridges!; 4-wire, 12 inch leads; 42mm/1.65" square body; 31mm/1.22" square mounting holes, 3mm metric screws (M3); 5mm diameter drive shaft, 24mm long, with a machined flat; 12V rated voltage (you can drive it at a lower voltage, but the torque will drop) at 350mA max current; 28 oz*in, 20 N*cm, 2 Kg*cm holding torque per phase; 35 ohms per winding