I made this model of a shredder as a school project a while ago.

Due to the flexibility of the plastic, the shredder isn’t truly functional, but the mechanism does move, and it's surprisingly satisfying to watch when turning the handwheel.

The layout is customizable: the blades, spacers, and gears are mounted on the shafts, and you can assemble them in any order or orientation you like. The nuts are used to tighten everything and keep the components securely in place.

If you want to use the handwheel, make sure to print the shredder_shaft_for_handwheel along with a regular shaft. If not, you can simply print two regular shafts. Feel free to make adjustments or explore other ways of powering this contraption.

This is an older project, so feel free to let me know if anything is missing or if you run into any issues.