Ender 5 plus ( and others) Thrust bearing support for the Z axis
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Stepper motors are not designed to support weight in the direction they are used for the Z axis.
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There are lots of these on here already. This one was designed for the F8X14X4mm thrust bearings I had left over from another project. This was printed in ASA, PETG probably would be good enough. I did have to run a 5mm drill bit through the shaft to clean it out and lightly sand the exterior of the shaft so it fit in the washer bottom.
What it does is support the weight of the Z axis so it does not depend on the stepper motor bearing. The ones inside the stepper are not really designed to handle axial loads. They do but it can shorten their life plus cause printing defects.
These were printed in ASA on a PEI sheet. I added parts cooling at 50% . That seems to help with print quality since this has small parts.