Mostly printed tumbler

cults3d

Print all parts once, including container-cap.stl one extra time so you have a cap at both ends. Print locking-plug.stl three extra times. Obtain four skateboard ball bearings (normal). With the locking plugs, attach them into the frame securely. Acquire a geared electrical motor: Amazon offers the Cylewet Motor with Shaft and Arduino CYT1037: https://www.amazon.com/Cylewet-Motor-Shaft-Arduino-CYT1037/dp/B01N9MS3UZ/ Kjell.com in Sweden sells the Luxorparts Hjul med Motor och Växellada: https://www.kjell.com/se/produkter/el-verktyg/elektronik/elektromekanik/motorer/luxorparts-hjul-med-motor-och-vaxellada-p90467 Aliexpress offers a motor with gear and shaft, but the link may not be stable: https://www.aliexpress.com/item/32868653773.html Attach the motor gear to the motor shaft. Place it in the frame. As a power source, use a USB-cable. Strip it and utilize the black and red wire for power. Simply twist each end, insert it into the holes on the motor, and bend them. Solder if desired. Place the container gear on one of the caps. Use a glove as the gear will cut into your hand. Gently screw it into the container. Tighten it securely. Put the gear onto the other cap. Now you can fill the container with brass and steel screws and are ready to tumble. Insert the item to tumble into the container. Close the cap. Place the container in the frame so the ends rest on the ball bearings. The gear should be on one of the caps and rest on the motor gear. If you give the motor power, it should rotate the motor gear. The motor gear should rotate the container gear, rotating the whole tumbler. Let it run for a couple of hours. Check the result and continue if more polish is needed. I built this item a long time ago but just recently finished it. Feel free to build upon it. It was made using blender as that is the tool I use. I created the gears with a plugin for blender. The threads inside the container were made by hand. It would probably take 10 seconds in Fusion 360. But then I would have to learn a new program.