"Twist" pencil box (remix)

thingiverse

Remix: - removed the sharp edge at the inner tube. The printer can't print it anyway. - increased the wall thickness of the outer tube, where is the gutter. In the first test printouts it turned out very thin. Even the holes were. - the gutter in the outer pipe is made with real 6mm. In the original model the gutter clearly less. - made temporary substitutes balls - "bullets". The bullets are temporary solution while you're looking for the 6mm steel balls and appropriate springs :) Springs are even harder to find than balls. Instead of springs (also tried to print), you can use a **soft** eraser. The size of inserts is picking up manually, just leave anough space for rubber enlargement under compression. Bullets (balls substitutes) made in 5.5 mm height, that in theory should coincide with 6mm ball under replace. So the height of the rubber insert can be equally calculated on any of the options - a steel ball or its substitute. Just in case added bullets model with a height of 12mm so that you can experiment with other elastic materials and cut the bullet to the desired height. In my printed thing I also added a grease to the gutter. And it works fine.