Stemer114

/* this module makes use of the polyhole library function by nophead (MCAD library)
 * MCAD Library - Polyholes Copyright 2011 Nophead (of RepRap fame)
 * It is licensed under the terms of Creative Commons Attribution 3.0 Unported.
 * https://github.com/SolidCode/MCAD/blob/master/polyholes.scad
 */
module polyhole_half(
        h=10,
        d=10
        )
{

Stemer114

//metric nut traps (M3 .. M4)
//see https://gist.github.com/Stemer114

// you can use the param functions for e.g. translation ops
// (access to height, thickness etc.)
function nut_trap_eps() = 0.1;        //epsilon environment for non-manifold differences
function nut_trap_m3_w()      = 5.5;  //M3 wrench size
function nut_trap_m3_h()      = 3;    //M3 nut thickness
function nut_trap_m3nyloc_h() = 4.1;  //M3 nyloc nut thickness
function nut_trap_m4_w()      = 7;    //M4 .. (and so on)

Stemer114

//counter-sunk screw
//(standing upside down on its head)
//defaults are for 3x20mm torx screw
module countersunk_screw(
        l=20,   //total length (including head)
        dH = 6,  //head dia
        lH = 3,  //head length
        dB = 3.2, //bolt dia (with tolerance) 
        lS = 0   //support thickness if any (set this to layer thickness for upside down printing)
        )

Stemer114

// slot hole, asymmetric (different dias at ends)
module slot_hole_asymmetric(
        w1 = 5,  //dia left
        w2 = 5, //dia right (if different)
        l = 20,  //length
        h = 5  //thickness
        )
{
    hull() {
        //left

Stemer114

//two polyholes (d1, h1 and d2, h2) stacked on top of each other
//can be used for modelling cutouts for cylinder head screws, bearings with axle bore etc.
//out of solid components
module stacked_polyholes(
        d1 = 5,   //first polyhole (bottom)
        l1 = 10,
        d2 = 10,  //second polyhole (stacked on top)
        l2 = 20,
        lS = 0   //optional support layer in betwenn (set this to layer thickness for upside down printing)
        )

Stemer114

/* this module makes use of the polyhole library function by nophead (MCAD library)
 * MCAD Library - Polyholes Copyright 2011 Nophead (of RepRap fame)
 * It is licensed under the terms of Creative Commons Attribution 3.0 Unported.
 * https://github.com/SolidCode/MCAD/blob/master/polyholes.scad
 */
function polyhole_hollow_eps() = 0.1; //epsilon environment for non-manifold differences
module polyhole_hollow(
        h=10,
        do=10,   //outer diameter
        di=8     //inner diameter