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rad = 31; |
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dx = rad/2; |
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hole_sz=6.5; |
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shaft_sz=30; |
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full_h = 4; |
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module screw_hole(x,y) { |
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translate([x,y,0]){ |
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linear_extrude(height = full_h+5, center = true, convexity = 10, twist = 0, slices = 20, scale = 1.0) { |
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circle(d=hole_sz, $fn=50); |
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} |
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} |
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} |
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module ring(inner, outer, height) { |
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difference() { |
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cylinder(h=height, r=outer, center=true, $fn=50); |
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cylinder(h=height+1, r=inner, center=true, $fn=50); |
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} |
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} |
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union() { |
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difference() { |
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hull() { |
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// cube([42.3,42.3,full_h], center=true); |
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translate([17,17,0]) cylinder(r=6,h=full_h,center=true); |
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translate([-17,17,0]) cylinder(r=6,h=full_h,center=true); |
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translate([-17,-17,0]) cylinder(r=6,h=full_h,center=true); |
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translate([17,-17,0]) cylinder(r=6,h=full_h,center=true); |
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} |
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translate([0,0,-1]){ |
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screw_hole(dx,dx); |
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screw_hole(dx, -dx); |
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screw_hole(-dx,dx); |
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screw_hole(-dx,-dx); |
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linear_extrude(height = full_h+4, center = true, convexity = 10, twist = 0, slices = 20, scale = 1.0) { |
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circle(d=shaft_sz, $fn=50); |
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}; |
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} |
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} |
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translate([0,0,full_h/2]) { |
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ring(15,17,2); |
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} |
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} |
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