3D Printed Standoff

standoff.scad

// manually install from https://github.com/Irev-Dev/Round-Anything
// into library directory:
//   Windows: My Documents\OpenSCAD\libraries
//   Linux: $HOME/.local/share/OpenSCAD/libraries
//   Mac OS X: $HOME/Documents/OpenSCAD/libraries
include <Round-Anything/polyround.scad>
$fn=40;

// primary dimensions
BIG_H=3.1;.  // Height of spacer between switch and and PCB
BIG_R=2.7;.  // Radius of spacer between switch and and PCB
SMALL_H=3.0; // Height of spacer that passes through PCB
SMALL_R=2.0; // Radius of spacer that passes through PCB

// detail dimensions
RECESS_H=.4;  // Height of recessed area in spacer that passes through PCB
RECESS_R=1.8; // Radius of recessed area in spacer that passes through PCB
BOLT_R=1.1;.  // Radius of bolt hole that passes through the part

difference() {
    union() {
        extrudeWithRadius(BIG_H, 0, .7, $fn) circle(BIG_R);
        translate([0, 0, BIG_H])
            cylinder(RECESS_H, RECESS_R, RECESS_R);
        translate([0, 0, BIG_H+RECESS_H])
            cylinder(SMALL_H-RECESS_H, SMALL_R, SMALL_R);    
    }
    cylinder(SMALL_H, BOLT_R, BOLT_R);
}