// Created 2018-2017 by D. Pantazis
// Used thread library created by Ryan A. Colyer.
// http://www.thingiverse.com/thing:1686322
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/
//
// v1.0
//
$fn=96;
use <./threads_v2p1.scad>

translate([-15,-15,-H/2])import("NutShell.stl", convexity=3);

// Create a thread
diameter = 18; // OD
pitch = 2.5;  // pitch

// part OD
OD=21.5;
H=15.5;

module RHole(height, position=[0,0,0], rotation=[0,0,0], tolerance=0.6) {
  ScrewHole(diameter, 1.5*H, position=position, rotation=rotation,
            pitch=pitch, tolerance=tolerance)
    children();
}
module LHole(height, position=[0,0,0], rotation=[0,0,0], tolerance=0.6) {
  mirror([1,0,0])ScrewHole(diameter, 1.5*H, position=position, rotation=rotation,
            pitch=pitch, tolerance=tolerance)
    children();
}

module HermiNut() {
difference () {
     translate([0,0,0])cylinder($fn=96, h = H, r1 = (OD)/2, r2 = (OD)/2, center = true);
#    translate([0,0,H])RHole(2*H);
#    translate([0,0,H])LHole(2*H);
 }
}
module ThreadChamferID() {
        cylinder(h = pitch, r1 = (diameter+0.75*pitch)/2, r2 = (diameter-2*pitch)/2, center = false);
}

module NutChamfer(){
difference(){
    cylinder(h = pitch, r1 = (OD+0.50*pitch)/2, r2 = (OD+0.5*pitch)/2, center = false);
    cylinder(h = pitch, r1 = (OD-2*pitch)/2, r2 = (OD+0.125*pitch)/2, center = false);
}}

 difference() {
 HermiNut();
 translate([0,0,-H/2-0.01])ThreadChamferID();
 translate([0,0,H/2+0.01])rotate([0,180,0])ThreadChamferID();
// translate([0,0,-.001-H/2])NutChamfer();
 translate([0,0,0.001+H/2])rotate([0,180,0])NutChamfer();
 }