Spider Coupling separation lock
thingiverse
Wasn't sure if I was getting backlash in my spider couplings so I designed, printed and installed 2 of these on my dual Z lead screw setup. I added a design to work with the thrust bearing caps I designed. It snaps on. Make sure it clears the motor mount! Fits 25.4mm long x 20mm diameter 8MM to 5MM coupling. https://www.amazon.com/gp/product/B07RMZCLZ3
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