Coffee knock box
thingiverse
Simple knock box for espresso coffee grinds.The pin is an interference fit so takes a bit of persuasion to slide in. 80 mm high x 100 mm diameter. I printed this quite thick, 2.5 mm wall diameter for the box. 4 mm wall diameter on the pin, seems sturdy enough to take a few whacks. 25% infill 0.28 mm layer height
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