30,000 RPM Eraser

I built a motorized eraser into a mechanical pencil

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They make a motorized eraser, but not built into any pencil that I've seen.

So I decided to make my own!

Video of the project:

This project includes:

-Small drone motor, powered by a small li-ion battery
-A couple of custom machined parts
-Tiny bearings to hold the rotating assembly
-Custom modified mechanical pencil

The graphite extension button still works, but it does stick up a little higher than normal because of the battery and wiring. 

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