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49 lines
1.3 KiB

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