SC8UU IGUS-profiled bushing

The bushing is an alternative of the SC8UU linear bearing. This reduces vibration and improves the smoothness of the stroke, which positively affects the quality of the print. Also the plastic bushing is much lighter than the standard bearing SC8UU.

The bushing has original IGUS profile ([RJ4JP-01-08](https://www.igus-cad.com/ccHandler.aspx?ArtikelNr=RJ4JP-01-08&OpenTree=1&pgid=102013))
The inner diameter of the hole in the model - 8.1mm