prusa mk 2 shaft for extruder idler bearing.
thingiverse
if making a prusa mk 2 dolly clone like in toms videos on youtube you will need to print one of these to use as an axel for the prusa idler bearing. its a 5/16 rod. the stl has three small pins with slightly differences in tolerance for you 3d printer. also i suggested you print the model file twice in your build plate as the more you print the more time it gets to cool down eacdh rod between prints which avoids overheating problems on small parts.
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