This is a small, compact, and parametric mechanical pencil eraser case designed to be tossed in a backpack or pencil bag that will keep your erasers from getting gross marks from your pencils.

It is designed for PaperMate mechanical pencil erasers, although it may fit other brands' erasers as well.

I have provided two models; one that fits five erasers and one that fits three. Additionally, this model requires the use of 8 3x3mm magnets, allowing the two halves to stick together. However, you could modify the design to fit a different magnet size if you would like or you can ask me to!

Modifying

Modification can be done after opening the .f3d file in Fusion. In the “Solid" tab, navigate to “Modify → Change Parameters.” You can then customize the eraser_count parameter to change how big your holder is. Keep the number odd, as otherwise the design will break!

Printing

This model doesn't require much structural integrity, so 2 walls should be enough. After printing, make sure you add the 3x3mm magnets!

License

This design is shared under the CC BY 4.0 license, meaning you can share, adapt, and sell copies of this design as long as you give proper attribution. This requires you to include the name of the creator (Ethan Bayer), a license notice, a link to the original material, and, optionally, the title.

Example

“Mechanical Pencil Eraser Case - Small & Compact” (https://www.printables.com/model/1390239-mechanical-pencil-eraser-case-small-compact/) is designed by Ethan Bayer and shared under a Creative Commons Attribution (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/).