5mm to 8mm coupler
thingiverse
This updated 5mm to 8mm shaft coupler features a compact design for restricted spaces, while also ensuring protection of your Z-axis during crashes. The coupler is engineered to fail before damaging your Z axis against the build platform or end stops when encountering resistance. Tested on both Printrbot Plus V1 and Prusa i3 with positive results, the version 8 couplers have two locking screws per shaft for higher torque demands. Look forward to the release of revision 9 that will include a damage-reducing failure mechanism.
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