MicroMo Electronics announces the ADM 1220 miniature stepper motor. The miniature stepper motor has an external motor-diameter of only 12 mm and a length of 17.2 mm. The ADM1220 has a holding torque without current of 2.4 mNm and can achieve a high boost torque of 4.1 mNm. The ADM1220 offers 20 full steps per revolution in full step mode and is capable of microstep operation at speeds ranging from 10 rpm to 6000 rpm.