nut_holes.scad

// nut holes for various nut sizes, centered at 0,0,0
// to use, translate and difference from the base solid.

// By Nenad Rijavec

// Feel free to use, modify and share as you see fit.


// draw a nut hex with the given dimensions. Use directly, or via precooked
// modules for each size.

module draw_nut_hex( r, thickness ) {
	linear_extrude( thickness )
	circle( r, $fn=6  ) ;
}

// modules for various nut sizes
//thickness defaults to the usual nut thickness, but can be changed as
//needed.
module nut_m3( thickness=2.8 ) { draw_nut_hex( 3.6, thickness ) ; }
module nut_m4( thickness=3.5 )  { draw_nut_hex( 4.7, thickness ) ; }
module nut_m5( thickness=4.0 ) { draw_nut_hex( 5.4, thickness ) ; }

//test calls 
difference() {
	translate( [ 3, 0, 0 ] ) cube( [ 14, 40, 6 ] ) ;
	union() {
		translate( [10, 5, 1] ) nut_m3( 6 ) ;
		translate( [10, 15, 1] ) nut_m4( 6 ) ;
		translate( [10, 30, 1] ) nut_m5( 6 ) ;
	}
}