Plastic DC Drive Gearbox ratio converter (48:1 to 13:1)

The adapter allows the gearbox to switch to 13:1 (700 rpm at 5V) instead of the original 48:1 (190 rpm at 5V). None component is destroyed and you can go back to the original gear setup.

https://s.click.aliexpress.com/e/_DeepRUz

New setup excludes the 2 last gears from the diagram. Typical torque of the DC motor is 20 g*cm, the original setup delivers near a kilo*cm of torque (960 g*cm) at 190 rpm, the new setup delivers 260 g*cm at 700 rpm