Ender 3 Pro Knurled Extruder Knob
thingiverse
I modified guppyk's knurled extruder knob because my Creality Ender 3 Pro didn't have the flattened 5 mm axis. This just fits directly on the extruder. It may take a little bit of force to put on but once you get it, it stays. Print top side down with no support.
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