About this 3D model

A shaft connected with an extendable gearboxThis is an accessory of the extendable gearbox which I designed before. It can connect with a shaft diameter of 2.0 to 3.0 mm. You can choose the gear ratio which decreases the speed and increase the torque. All printed without a support layer Detail information on Youtube:https://youtu.be/b-V6H0a3kvE