Rotary Media Tumbler - 15-20lb

thingiverse

List of Materials 24V 35W 50RPM Gear Motor https://www.amazon.com/dp/B07GBS8HFT?psc=1&ref=ppx_yo2ov_dt_b_product_details M4-0.7x14mm Flat Head Phillips Drive Screws (4 Needed) https://www.amazon.com/dp/B07D5S2ZY9?psc=1&ref=ppx_yo2ov_dt_b_product_details 8mmx100mm Steel Rods (2 Needed) https://www.amazon.com/dp/B09DCLV6QC?psc=1&ref=ppx_yo2ov_dt_b_product_details 8mm Flange Shaft Coupler (5 Needed) https://www.amazon.com/dp/B07R8CJ36F?psc=1&ref=ppx_yo2ov_dt_b_product_details 698-2RS Ball Bearings 8mmx19mmx6mm (4 Needed) https://www.amazon.com/dp/B07FW35184?psc=1&ref=ppx_yo2ov_dt_b_product_details PWM Motor Speed Controller https://www.amazon.com/dp/B075L66DHX?psc=1&ref=ppx_yo2ov_dt_b_product_details 24V 5A Power Supply https://www.amazon.com/dp/B09V179D6N?psc=1&ref=ppx_yo2ov_dt_b_product_details 40mm 24V Fan https://www.amazon.com/WINSINN-Ender-Upgrade-Bearing-CR-10S/dp/B08R9L9YR2/ref=sr_1_5?crid=2EJ4NAB4IIQ7K&keywords=24v+ender+3+fan&qid=1676943741&sprefix=24v+ender+3+fan%2Caps%2C183&sr=8-5 5mm Bolts, Washers, and Nuts M3x6mm Button Machine Screws M3 Embedment Nuts Do not use PLA for the canister. It tends to bulge when putting warm water inside due to the heat and vapor pressure. ABS worked great, PETG should work fine but I have not tried it. For the gearing I opted to use Polycarbonate since it is significantly harder and seems slicker than ABS. Nylon would also work fine. All body components were printed with ABS. I would avoid PLA period with this print as there is a lot of dynamic force when in use. I was able to load this up to 20 pounds total canister weight and use it continually. I like to follow STM's suggested recipe of 2Tbsp Dawn dish soap, 1/4t Lemi-Shine and use all 7 pounds of my steel media. I still have enough room to add 5-7 pounds of brass in the canister. Be mindful of wire routings to avoid the gears grabbing them. Also - should go without saying - Keep your fingers out of the gears. This gear motor is already geared down significantly without the additional gear reduction this system gives it. Fingers will probably not stop the gears from turning. I'll be working on an assembly guide for this project.