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95 lines
2.5 KiB
OpenSCAD
95 lines
2.5 KiB
OpenSCAD
/*
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* Bearing model.
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*
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* Originally by Hans Häggström, 2010.
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* Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
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*/
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include <units.scad>
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include <materials.scad>
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// Example, uncomment to view
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//test_bearing();
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//test_bearing_hole();
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module test_bearing(){
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bearing();
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bearing(pos=[5*cm, 0,0], angle=[90,0,0]);
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bearing(pos=[-2.5*cm, 0,0], model=688);
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}
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module test_bearing_hole(){
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difference(){
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translate([0, 0, 3.5]) cube(size=[30, 30, 7-10*epsilon], center=true);
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bearing(outline=true);
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}
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}
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BEARING_INNER_DIAMETER = 0;
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BEARING_OUTER_DIAMETER = 1;
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BEARING_WIDTH = 2;
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// Common bearing names
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SkateBearing = 608;
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// Bearing dimensions
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// model == XXX ? [inner dia, outer dia, width]:
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function bearingDimensions(model) =
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model == 608 ? [8*mm, 22*mm, 7*mm]:
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model == 623 ? [3*mm, 10*mm, 4*mm]:
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model == 624 ? [4*mm, 13*mm, 5*mm]:
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model == 627 ? [7*mm, 22*mm, 7*mm]:
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model == 688 ? [8*mm, 16*mm, 4*mm]:
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model == 698 ? [8*mm, 19*mm, 6*mm]:
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[8*mm, 22*mm, 7*mm]; // this is the default
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function bearingWidth(model) = bearingDimensions(model)[BEARING_WIDTH];
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function bearingInnerDiameter(model) = bearingDimensions(model)[BEARING_INNER_DIAMETER];
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function bearingOuterDiameter(model) = bearingDimensions(model)[BEARING_OUTER_DIAMETER];
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module bearing(pos=[0,0,0], angle=[0,0,0], model=SkateBearing, outline=false,
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material=Steel, sideMaterial=Brass) {
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// Common bearing names
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model =
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model == "Skate" ? 608 :
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model;
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w = bearingWidth(model);
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innerD = outline==false ? bearingInnerDiameter(model) : 0;
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outerD = bearingOuterDiameter(model);
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innerRim = innerD + (outerD - innerD) * 0.2;
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outerRim = outerD - (outerD - innerD) * 0.2;
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midSink = w * 0.1;
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translate(pos) rotate(angle) union() {
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color(material)
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difference() {
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// Basic ring
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Ring([0,0,0], outerD, innerD, w, material, material);
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if (outline==false) {
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// Side shields
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Ring([0,0,-epsilon], outerRim, innerRim, epsilon+midSink, sideMaterial, material);
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Ring([0,0,w-midSink], outerRim, innerRim, epsilon+midSink, sideMaterial, material);
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}
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}
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}
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module Ring(pos, od, id, h, material, holeMaterial) {
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color(material) {
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translate(pos)
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difference() {
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cylinder(r=od/2, h=h, $fs = 0.01);
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color(holeMaterial)
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translate([0,0,-10*epsilon])
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cylinder(r=id/2, h=h+20*epsilon, $fs = 0.01);
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}
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}
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}
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}
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