Planetary Gearbox System

High-precision 5.33:1 planetary gear system designed for robotic arms and industrial automation. Features 9-tooth sun gear, three 15-tooth planets, and 39-tooth ring gear, delivering 2 Nm output torque with NEMA 17 stepper motors. Compact 150mm design supports 450-680g payload capacity with scalable multi-stage configuration (28.4:1 dual, 151:1 triple stage). Complete SolidWorks files and 3D-printable STL models included with assembly documentation. Optimized load distribution across three planet gears ensures minimal backlash and high angular resolution. Perfect for 4-axis robotic applications, CNC automation, pick-and-place systems, and educational platforms. Ready for immediate fabrication and integration with standard stepper motor drivers.