Simple bearing with tapered rollers for axial load.

The rollers work best when made in a "spiral vase" mode with the maximum possible wall thickness.
(even better if with a wide nozzle, e.g., 0.8mm)

• It supports at least 70 kg.

• It can be scaled to any size.

• It can be improved by placing a 1mm metal wire shaft in each roller so that they do not touch the cage.

onshape link:

https://cad.onshape.com/documents/581d5515a5b4567c0ef67cd8/w/39dc927968d67aece887a2e4/e/ebc7a252860bd93d1bdc010c?renderMode=0&uiState=6943fe1f284f8f4038e93d16