Linear Bearing (SCS6UU, SCS8UU)

This Thing is only useful in combination with [mightynozzle's](https://www.thingiverse.com/mightynozzle) [Customizable Linear Bushing / Bearing](https://www.thingiverse.com/thing:2202854).

First create the LM*n*UU STL file with [Customizable Linear Bushing / Bearing](https://www.thingiverse.com/thing:2202854). The settings for bushing_length_in_millimeter however must match the value in the L column of BearingParam in this OpenSCAD file, else the LM*n*UU is too short. E.g 25 for LM6UU and 30