Available with unipolar and bipolar windings, the PF55 two-phase tin-can style stepper motors from Nippon Pulse respectively offer a holding torque of 120N and 150N for the two winding types. In a full-step (2-2) excitation mode, the motors provide 48 steps per revolution, a rated voltage of 5 and 12V, inductance between 12 and 37mH, and resistance between 5 and 36 ohms. They also come in a gear head model with 20 different ratio options, ranging from 6/25 to 1/300. These gear head motors provide maximum torques of 400, 700, and 1000 mNm. All variations are also available with a connector.