Anti wobbler with YABB (yet another ball bearing)

thingiverse

I've tried to stabilize my Prusa i3 mk8 z-axis with custom printed materials. My goal was to utilize locally created components for this purpose. First, I sourced ball bearings from Thingiverse but none matched my requirements. To accommodate these bearings, I designed a mounting plate that fits on the top of the z-axis. Each bearing is secured using three M3x12 countersunk screws, with M8 threads at their centers to connect with the z-shafts. To eliminate pipe wobbling between the shaft and motor connection, I replaced it with a solid part. The lower section presses over the motor's axis and is fixed with an M3 screw, while the upper side features an M8 thread for the z-shaft. Initially, the ball bearings presented some issues, but after using a M8 nut and nylon washer to counteract them from below, I achieved minimal clearance between the balls through tuning. As a result, most of the wobble has been eliminated. The FreeCAD data for these components can be found in two separate files: Lager.FCStd contains the ball bearing design, while Support.FCStd includes the remaining parts.