Filament holder simple metal

This is my version of a filament holder with ball bearings for my printrbot simple metal.

It is printed in PLA with a layer height of 0.2mm

There are inserted three ball bearings in each of the rollers.

In addition to the printed parts to be used

1 x m8 threaded rod of 210mm.

6 x 16mmx8mmx5mm Steel bearins
2 x m5 nuts.

2 x m8 nuts.

2 x m8 wing nuts.

2 x m5 spring plunger.

1 x 15mm fjerder with 8 mm hole.

1 x m8 washer.