Universal Tumbler Machine

you can use any drum size. even it is heavy because the weight depends on the ball bearing . You need 8x22 ball bearing, 8mm rod and gear motor. you can use any gear motor (uncentered shaft), just add adaptor, motor shaft will be adjusted by moving the bracket. the design will minimize parts to print and time. simple to essamply. and less maintenance. at the last stl file you will find vin , print it and glue it inside drum.