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Gilles Bouissac edited this page Apr 1, 2024 · 12 revisions

Tutorial for screws, bolts and nuts shapes and passages

Prerequisites

See instructions here

Adapt the reading to the standard you need

This tutorial applies to all standards. The examples are given for metric coarse standard.

Changes to do in the reading to adapt to other standards are summarized in this table:

  • MXC: Metric Coarse standard (International standard)
  • MXF: Metric Fine standard (International standard)
  • UNC: Unified National Coarse standard (US standard)
  • UNF: Unified National Fine standard (US standard)
  • BSW: British Standard Whitworth (UK standard)
  • BSF: British Standard Fine (UK standard)
Tutorial code MXC MXF UNC UNF BSW BSF 
mx-screw.scad
 
mx-screw.scad
 
mxf-screw.scad
 
unc-screw.scad
 
unf-screw.scad
 
bsw-screw.scad
 
bsf-screw.scad
 
mxBolt
 
mxBolt
 
mxfBolt
 
uncBolt
 
unfBolt
 
bswBolt
 
bsfBolt
 
mxNut
 
mxNut
 
mxfNut
 
uncNut
 
unfNut
 
bswNut
 
bsfNut
 
mxClone
 
mxClone
 
mxfClone
 
uncClone
 
unfClone
 
bswClone
 
bsfClone
 
M3
 
M3
 
MF3
 
UNC_N5
 
UNF_N5
 
BSW5_32
 
BSF5_32

Direct access to the code of the tutorial for each standard:

Tutorial

Step Code Result
Some walls 
use <agentscad/lib-screw.scad>
use <agentscad/mx-screw.scad>
...
module showcaseWalls( wh1, wh2, ww=200, wp=20 ) {
    translate ( [0,wp/2,0] )  {
        color( "LightSkyBlue" )
        translate ( [0,0,-(wh2+wh1)/2] )
            cube( [ww,wp,wh2], center=true );
        color( "DodgerBlue" )
        translate ( [0,0,0] )
            cube( [ww,wp,wh1], center=true );
    }
}
showcaseWalls (3,10,15);
Bolt passage 
...
screw = M3(10,3);
difference() {
    showcaseWalls (3,10,15);
    mxBoltPassage (screw);
}
Allen bolt 
#mxBoltAllen  (screw);
Hexagonal bolt 
#mxBoltHexagonal  (screw);
Tight passage
allen		 
...
screw = M3(10,3);
difference() {
    showcaseWalls (3,10,15);
    mxBoltAllenPassage (screw);
}
%mxBoltAllen (screw);
Tight passage
hexagonal		 
...
screw = M3(10,3);
difference() {
    showcaseWalls (3,10,15);
    mxBoltHexagonalPassage (screw);
}
%mxBoltHexagonal (screw);
Nut passage 
...
difference() {
    showcaseWalls (3,10,15);
    mxBoltHexagonalPassage (screw);
    translate( [0,0,-screwGetThreadL(screw)] )
        mxNutPassage (screw);
}
Hexagonal nut 
...
translate( [0,0,-screwGetThreadL(screw)] )
    %mxNutHexagonal (screw);
Square nut 
...
translate( [0,0,-screwGetThreadL(screw)] )
    %mxNutSquare (screw);
Hexagonal nut passage 
...
difference() {
    showcaseWalls (3,10,15);
    mxBoltHexagonalPassage (screw);
    translate( [0,0,-screwGetThreadL(screw)] )
        mxNutHexagonalPassage (screw);
}
Square nut passage 
...
difference() {
    translate ( [0,-3,0] )
        showcaseWalls (3,10,15);
    mxBoltPassage (screw);
    translate( [0,0,-screwGetThreadL(screw)+4] )
        mxNutSquarePassage (screw);
}
%mxBoltHexagonal (mxClone(screw,12));
translate( [0,0,-screwGetThreadL(screw)+4] )
    %mxNutSquare (screw);
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