
MakerGear M2 Enhanced Z-Axis Knob
thingiverse
To improve the design, the ID was made into a press fit with this collar: http://www.amazon.com/gp/product/B000P0QAG8/ref=oh_details_o05_s00_i00?ie=UTF8&psc=1. Additionally, "M2" was replaced by an arrow pointer to enhance orientation clarity. Lastly, fillets and chamfers were added for both aesthetic appeal and increased strength.
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