Bearing Block for U30

This is a ball bearing block for filament spools. Used with "old" ball bearings from Longboard/Skateboard. It has a slider to Lock/Unlock. The distance from the screw holes are from the filament holder Alfawise U30.
The STL "Lagerhalter.stl" is needed 4 times. You can print all the things together.

You additional need:
6x M3 Nuts
6x M3x16 Screws
4x M3 Washer

2x M4 Nuts
2x M4x30 Screws

8x Ball Bearings Outer diameter 22mm, Thick 7mm and Inner diameter is 8mm

And a spring from a B