GMP12S-N20VA 12mm Planetary Gear Motor N20 DC Motor with Encoder Option High Torque Micro Gearmotor
12mm planetary gearbox + N20 PMDC motor — a high-performance micro drive with excellent torque-to-size ratio.
Planetary gear structure — compared with standard spur gearboxes, the planetary design offers higher torque capacity, smoother operation, better wear resistance and longer service life.
Encoder option available — the GMP12S-N20VA can be equipped with an encoder, enabling precise speed control, position feedback and closed-loop operation for robotics, automation and precision instruments.
Fast and stable output — the 2.4V and 5V versions both offer up to 920 rpm no-load at 1/16 ratio, and down to 67 rpm no-load / 53 rpm rated at 1/216 ratio with 0.3 kg.cm rated torque.
Efficient N20 motor performance — rated torque of 2.5 g.cm, rated power of 0.31 W, and low current consumption.
Ultra-lightweight — total weight is only approximately 13 g, perfect for portable and miniature devices.
Compact dimensions — 12mm gearbox diameter, Φ3 mm output shaft, M2x0.4 mounting threads and a short overall length.
Customizable for OEM projects — reduction ratio, output shaft, cable, connector and encoder configuration can be customized on request.
Robotics — robot joints, grippers, humanoid robots, educational robots, service robots and robotic arms (especially with encoder feedback).
Medical and healthcare — portable pumps, syringe pumps, massage devices, rehabilitation equipment and laboratory automation.
Smart home — smart locks, automatic curtains, smart feeders, camera gimbals and small door mechanisms.
Security and surveillance — CCTV pan/tilt systems, access control, electronic locks and security cameras.
Precision instruments — optical devices, measuring instruments, testing equipment and analytical tools.
Industrial automation — valve actuators, vending machines, solar trackers, conveyor systems and small positioning devices.
Consumer electronics — RC models, drones, toys, beauty devices and handheld gadgets.
Automotive — mirror actuators, headlight adjusters, charging port locks and small automotive actuators.












