chair-wheel-holder.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 module spacer() {
   5         difference() {
   6                 cylinder(r = 33/2, h = 5);
   7                 translate([0, 0, -eps])
   8                         cylinder(r = 15/2, h = 5 + 2*eps);
   9         }
  10 }
  11
  12 module inner() {
  13         difference() {
  14                 translate([-21/2, -21/2, 0])
  15                         cube([21, 21, 21]);
  16                 // hole
  17                 translate([0, 0, -eps])
  18                         cylinder(r = 11.5/2, h = 21 + 2*eps);
  19                 // hole - moiddle ring
  20                 translate([0, 0, 9])
  21                         cylinder(r = 12.5/2, h = 3);
  22                 // bottom cuts
  23                 for (x = [-1, 1]) scale([x, 1, 1])
  24                 translate([21/2-1, -infty/2, 0])
  25                 rotate([0, 45, 0])
  26                         cube(infty);
  27                 // bottom cuts
  28                 for (x = [-1, 1]) scale([x, 1, 1])
  29                 translate([21/2, -infty/2, 21-1])
  30                 rotate([0, -45, 0])
  31                         cube(infty);
  32         }
  33 }
  34
  35 //  spacer();
  36
  37 inner();