Number of Scrow and nut for 3D printer We need : Extruder :- 4cm3mm = 1 2cm3mm = 6 3cm3mm = 4 Z axis :- 2.5cm3mm = 10 1cm3mm = 16 Y axis :- 2.5cm3mm = 3 3cm3mm = 4 1cm3mm = 2 X axis :- 2cm3mm = 4 1.5cm3mm = 4 LCD :- 2.5cm3mm = 4 Arduino :- 2.5cm3mm = 6 1.5cm*3mm = 1 about 8mm :- 20.5cm * 8mm = 4 about 10mm :- 42cm * 10mm = 2 about Nut :- 3mm = 46 8mm = 22 10mm = 12