1_fidget-spinner.stl

2_fidget-spinner.scad

// Copyright 2017 Jason R. Huggins
// License: MIT

BEARING_DIAMETER = 16.15;
MARGIN = 6;
ARM_LENGTH = 30;

module arm() {
  difference() {
    union() {
      cylinder(h=5, d=BEARING_DIAMETER + MARGIN, $fn=30);

      translate([0, -(BEARING_DIAMETER + MARGIN)/2, 0])
      cube([ARM_LENGTH, BEARING_DIAMETER + MARGIN, 5]);

      translate([ARM_LENGTH, 0, 0])
      cylinder(h=5, d=BEARING_DIAMETER + MARGIN, $fn=30);
    }

    translate([0,0,-5])
    cylinder(h=15, d=BEARING_DIAMETER, $fn=30);

    translate([ARM_LENGTH,0,-5])
    cylinder(h=15, d=BEARING_DIAMETER, $fn=30);
  }
}


union() {
  arm();

  rotate(120)
  arm();

  rotate(240)
  arm();
}