big eraser block for microfiber cloth
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This two piece block uses a threaded post to clamp and hold a cleaning cloth.
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- Creative Commons — Public Domain
Holds a microfiber cloth to make a chalkboard eraser. Could be used for any other cloth you like. Large size; base is 100mm x 200mm and handle width is 86mm. Grooves along the side make it easier to hold, and it could be scaled down for something smaller. I printed a second one scaling each part uniformly to 70% its original size (so, 70mm x 140mm for the base), and I think it's a little better.
The basic idea is similar to a sanding block or buildplate cleaner, but redesigned from scratch to be more suitable as an eraser base. Freecad file included for easy modification.
Note: The threads are standard metric (M30), so they have severe overhang and required a lot of cleanup. If I were going to do it again, I would redesign the bolt/nut so that the threads don't have such a sharp overhang angle and print better without supports.