Eines: clau fixa M3/M4

Codi openscad

// manec

l=70;

w=10;

// gruix

h=4;

// veure https://en.wikipedia.org/wiki/ISO_metric_screw_thread#Hex_head_widths

// M3

r1=10;

n1=5.5;

// M4

r2=12;

n2=7;

f1=n1+0.5;

f2=n2+0.5;

p1=f1/sqrt(3);

p2=f2/sqrt(3);

difference(){

 union () {

  translate ([0,-w/2,0]) cube ([l, w, h]);

  cylinder (r=r1, h=h, $fn=48);

  translate ([l,0,0]) cylinder (r=r2, h=h, $fn=48);

     }

 union () {

   translate ([-p1,0,0]) rotate ([0,0,15]) cylinder (r=p1,h=h, $fn=6);     

   translate ([-p1,0,0]) mirror ([1,0,0]) rotate ([0,0,-15]) translate ([0,-f1/2,0]) cube ([r1,f1,h]);

   translate ([l+p2,0,0]) rotate ([0,0,15]) cylinder (r=p2,h=h, $fn=6);     

   translate ([l+p2,0,0]) rotate ([0,0,15]) translate ([0,-f2/2,0]) cube ([r2,f2,h]);

     } 

}