This project is another tracked construction machine – but not a crane. This video focuses on building the running track drive, featuring a two‑stage planetary transmission inspired by real‑vehicle design. From fabricating the track frame, idler, and road wheels, to assembling the planetary reduction unit and testing with a motor – watch the full build process. Plenty of torque, smooth running, and a few challenges along the way. Can you guess what machine this will become? Stay tuned for the full reveal!