Terminal block holder

File:Tbh.stl

//Terminal Block Holder v1
//James Sullivan
//5/1/17
//OpenSCAD version 2015.03-1 
//HacDC, cheap Chinese laser, K40, 40 watt
//These parts hold a terminal block for landing of the wires going to the safety interlock switches.  It is designed to use self threading screws without nuts.  Handedness is based upon which end of the terminal strip the mount sets on when looking at the terminal strip.  The right piece goes toward the back of the machine and is installed first.  The left piece goes toward the front of the machine and is installed second.
thick=5;	//thickness of part
metal=1;	//metal thickness of the chassis sheet metal
slot=16;	//width of slot in mount, width of flange on machine, full width outside to outside!
height = 15;	//z distance of mount, extrusion height, installed length
tw=slot+2*thick;    //total width
$fn=40;
bhd=4.0;   //bolt hole diameter
et=4.0;     //end thickness between bolt hold perimeter and square end
ew=12.0;    //end width
foo=6.7;    //width of cylinders
foo2=8.7;   //thickness of terminal strip in axial direction of mounting screws
rd=2.8;     //root diameter of mounting screws
module right(){ difference(){
	union(){
		cube([tw,thick,height]); //top horizontal
		translate([thick+metal,-thick-metal,0]) cube([slot+thick-metal,thick,height]); //lower horizontal
		translate([0,-metal-thick*1.5,0]) cube([thick,metal+thick*2.5,height]); //left vertical
		translate([thick+metal,-1.5*thick-metal,0]) cube([thick,thick*1.5,height]); //center vertical
		translate([slot+thick,-metal-thick,0]) cube([thick,metal+thick*2,height]); //right vertical
        translate([thick*2,-ew-metal,0]) cube([slot-thick,ew,height+bhd+2*et]);
 	}
    translate([0,-ew/2-metal,height+et+bhd/2]) rotate([0,90,0]) cylinder(d=rd,h=tw);    
}}

right();
translate([0,20,0]) mirror([0,1,0]) right();