OpenSCAD thread test

thread-tests.scad

include <../threads.scad>;
// threads library from: https://dkprojects.net/openscad-threads/
// probably updated since, as I downloaded this a while back

od = 30;
id = od - 1;
wall = 4;
$fn=64;
fillet=2;
lid_th=1;

translate([0,od*0.5+wall*2,0]) collar_top();
translate([0,od*-0.5-+wall*2,0]) collar_bottom();

module collar_bottom() {
    thread_h=10;
    difference() {
      cylinder(d=od+wall*2,h=thread_h+lid_th);
      translate([0,0,lid_th-0.01]) metric_thread(diameter=od+5, internal=true, pitch=3, leadin=1, length=thread_h*1.01);
    }
}

module collar_top() {
    fit = 0.5;
    difference() {
      union() {
        cylinder(d=od+wall*2,h=lid_th+fillet);
        translate([0,0,lid_th-0.01]) metric_thread(diameter=od+5-fit, pitch=3, leadin=1, length=10);
      }
      translate([0,0,lid_th+fillet]) cylinder(d=od,h=8.01);
      translate([0,0,lid_th]) cylinder(r1=od/2-fillet,r2=od/2,h=fillet);
    }
}