ANET A8 Z axis sleeve for PTFE bushing
thingiverse
This sleeve is perfect to insert some PTFE bushings like the ones sold on AliExpress: https://www.aliexpress.com/item/JETTING-10PCS-Wear-Resisting-SF-1-Self-Lubricating-Bearing-Bushing-8x10x12mm/32825258959.html?spm=a2g0s.9042311.0.0.t7Istv The sleeve size is 60mm x 15mm with an inside diameter of 10mm. My Z axis was wobbling quite a lot and the linear bearings really don't help. The new PTFE bushings with this sleeve gives the X carriage new rigidity and no more Z axis wobble. Just push out the existing bearings and insert the new sleeve. Put a bit of loctite on the bearings to keep them in place.
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