prusa mk 2 shaft for extruder idler bearing.
thingiverse
If making a Prusa MK 2 dolly clone like Tom's videos on YouTube, you'll need to print one of these for use as an axle for the Prusa idler bearing - a 5/16 rod is required. The STL features three small pins with slightly varying tolerances to accommodate your 3D printer's specifications. It's also recommended that you print the model file twice on your build plate, allowing each rod to cool down thoroughly between prints and preventing overheating issues with small parts.
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