Modified Z-axis to Mendel90 3D printers.

Modified Z-axis to Mendel90 3D printers,
In parts, it can be mounted bearings on the threaded bar.

Bom:
- these plastic parts
- removed screws and nuts
- 4 pcs bearings 13x6x5 mm
- 1 pcs M5 lock nut
- 1 pcs M5x30mm bolt