Improved 5mm to 3/8" z-Axis Coupling for Printrbot Plus
thingiverse
A self-centering coupling modified from Thingiverse user loco (http://www.thingiverse.com/loco). Fits the larger 3/8 inch Acme rods for decreased a-axis wobble compared to the stock couplings. v1.1 Increased the internal diameter of the bolts to be easier to tighten. Instructions It is recommended to print with 100% infill with this print for increased strength. The 3/8" nut can be hard to tighten up so some finishing on the inner diameter of the coupling may need to be performed to make it wider,
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