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/* Linear units are mm */
ext_dia = 40.0;
int_dia = 6.2;
h = 8;
cyl_dia = 14.0;
cyl_h = 20.0;
mnth_dia = 4.2;
mnth_ins_dia = 8;
mnth_ins_h = 2.0;
mnth_center_r = 12.0;
mnth_num = 2;
seth_dia = 3.2;
//seth_ins_dia = mnth_ins_dia;
//seth_ins_h = mnth_ins_h;
seth_ins_dia = 6.2;
seth_ins_h = 8.0;
seth_num = 2;
nut_w = 5.35 + 0.2;
nut_h = 6.05 + 0.2;
nut_d = 2.5;
nut_offr = 6.0;
$fn = 64;
difference() {
union() {
intersection() {
cylinder(d=ext_dia, h=h);
translate([-ext_dia/2, -10.0, 0]) cube([ext_dia, 20.0, h]);
}
cylinder(d=cyl_dia, h=cyl_h);
}
cylinder(d=int_dia, h=cyl_h);
for (alpha = [0 : 360/mnth_num : 359.9999]) {
rotate(alpha, [0, 0, 1])
translate([-mnth_center_r, 0, 0])
union() {
cylinder(d=mnth_dia, h=cyl_h);
translate([0, 0, h-mnth_ins_h]) cylinder(d=mnth_ins_dia, h=mnth_ins_h+cyl_h-h);
}
}
for (alpha = [ 0 : 360/max(seth_num, 4) : 359.9999 * seth_num/max(seth_num, 4)]) {
translate([0, 0, h/2])
rotate(alpha + 360/mnth_num/4, [0, 0, 1])
union() {
translate([-nut_offr, 0, 0]) {
cube([nut_d, nut_w, nut_h], center=true);
translate([0, 0, -h/2])
cube([nut_d, nut_w, h/2], center=true);
}
rotate(-90, [0, 1, 0])
union() {
cylinder(d=seth_dia, h=ext_dia/2);
translate([0, 0, ext_dia/2-seth_ins_h]) cylinder(d=seth_ins_dia, h=seth_ins_h);
}
}
}
}
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