Z Threaded rods ball bearing guide
thingiverse
I recently upgraded the 30mm standard (and bent) threaded rods with higher-quality (and straight), longer ones - 40cm instead. So, I designed this add-on for my z-axis top bracket to guide the rods more smoothly and reduce friction by incorporating a ball bearing. If you're using shorter 30cm rods, I've also created an adapter that's easy to attach firmly with cable ties on your existing rods. The ADAPTOR needs RAFT because of its very small base; print it with the open end facing up.
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