Ender 3 Z-Axis Knob
thingiverse
A key for manual control of the z-axis lead screw on your Ender 3, also compatible with CR10 printers and others using T8 lead screws with 4 start threads and an 8.0mm pitch or 2mm per thread. I redesigned this from the https://www.thingiverse.com/thing:2534990 CR10 lead screw knob as it kept coming loose. I rebuilt the whole key in solid works, adding a longer thread for added security. All text is inset to ensure the key prints flat and smooth.
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