World's Tiniest Gearmotor Outdoes Larger Units

The BL 1900 brushless gearmotor and planetary gearhead is claimed as the world's smallest commercially available gearmotor. Yet, at 1.9 mm (0.075") diameter, the unit is said to outperform products twice its size. The system uses a bipolar, rare-earth permanent magnet for the motor rotor, LIGA cast gears in its gearhead, and a sensor-less electronic commutation system. Continous output torque is 0.02 oz.-in. and intermittent output torque is 0.042 oz.-in. with speeds up to 100,000 rpm.