Designed this small rotary tool in order to drill the small holes for pcbs and do light sanding work.
12v DC Motor: https://www.amazon.com/gp/product/B01M58POHF/
12v Motor Controller: https://www.amazon.com/gp/product/B00N30UK2
Chuck: https://www.amazon.com/dp/B07XJ24NG2 (Any of those collet chucks with the right hole diameter for the motor shaft will work.)
9v Battery & Connectors
I printed the main body with the flat side on the buildplate and using organic supports makes it much easier to remove the inner support material.
The author marked this model as their own original creation.