3D printed and speed controlled 160mm Rock Tumbler

thingiverse

This is my design of a rock tumbler. What is special about it? - The Frame is mostly printed. The assembly is very easy. - The speed of the tumbler is controllable. - With this regulator, and the different drive wheel’s, you are able to use nearly all available cheap 550 size brushed motors with a shaft diameter of 3,17/3,2mm. Print: Decide before print if you want to control the tumbler, or if you want to go uncontrolled. - For the Frame (speed controlled), print the Tumbler part 1, 2, 3, 4. Fort he uncontrolled version, print part 1, 2x2, 4. - 4x guide wheel 8mm - 1x motor drive gear 3,2mm - 1x Tumbler gear wheel with the diameter of your choice. Assembly: - Insert 8 squared M3 nut into the side parts. Join all 4 parts as shown in the pictures, and use 4 M3 bolts to finalize the frame assembly. - Insert 4x 608zz bearings into the front and back frame part. - Heat up the motor shaft up to 150°, and push it onto the Tumbler motor drive gear 3,2mm. The hot motor shaft will melt the PLA and it will end up in a robust connection. Be aware, the hole in the Tumbler motor drive gear 3,2mm in cylindrical. Measure and define the wider hole to press the motor shaft in. - Cut the M8 threats into the right lengths, attach o-rings to the. - Assembly the roller arms like shown in the picture. - Use strong rubber bands or o-rings of the right size to connect the motor drive gear with the gear wheel. - Connect the motor to the PWM control board. - Connect the 5.5mm jack with the PWM control board. - Use a standard 12V power supply to operate the tumbler. - As a tumble, I’m using 160mm „KG“ fittings with two caps. - Optional: Print the Lid knob and attach it with 3x M3 nuts and bolts to one of the lids. Parts: - 550 brushed motor (I used a Mabuchi RS-550VC-7525) - 4 O-rings with a inner diameter of 18-20mm - 4 x 608zz bearings - 8 M3 squared nut - 8 M3x25 / M3x30 hex - M8 threat rod /220mm & 240mm - 14 M8 nuts - 5.5 X 2.1Mm jack mountable - 1x Dc5-35V 5A PWM Dc Motor (https://de.aliexpress.com/i/33040837362.html) <iframe width="560" height="315" src="https://www.youtube.com/embed/JtEjiEUgj94" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> If you like my design, feel free to leave my a tipp :-)