7 d_minus = thick; // cca 45 deg
9 center_hole_d = 4.8+0.5;
18 cylinder(r1 = diameter/2, r2 = diameter/2-d_minus/2, h = thick/2 + eps);
19 translate([0, 0, thick/2-eps])
20 cylinder(r2 = diameter/2, r1 = diameter/2-d_minus/2, h = thick/2 + eps);
25 if (center_hole_d2 > 0) {
26 translate([0, 0, 0.5])
27 cylinder(r1 = center_hole_d/2, r2 = center_hole_d/2+0.2, h = thick + 2*eps, $fn = 8);
28 translate([0, 0, -eps])
29 cylinder(r = center_hole_d2/2, h = thick + 2*eps, $fn = 128);
31 translate([0, 0, -eps])
32 cylinder(r = center_hole_d/2, h = thick + 2*eps, $fn = 128);
35 for (angle = [0:360/side_holes:360]) rotate([0, 0, angle+180/side_holes])
36 translate([2*diameter/7 - d_minus + center_hole_d/2, 0, -eps])
37 cylinder(r = side_hole_d/2, h = thick + 2*eps, $fn=128);
40 translate([0, 0, base_thick])
42 r1 = center_hole_d/2 + base_thick,
43 r2 = diameter/2-d_minus/2,
44 h = thick-base_thick+eps, $fn = 128);
45 translate([0, 0, base_thick-eps])
46 cylinder(r1 = center_hole_d/2 + base_thick,
47 r2 = center_hole_d/2 + base_thick/2,
48 h = thick - base_thick + eps, $fn = 128);
51 translate([diameter/3-cut_hole_d/2, 0, -eps])
52 cylinder(r = cut_hole_d/2, h = thick + 2*eps, $fn =128);
53 translate([diameter/2-d_minus/2, -cut_slot/2, -eps])
54 cube([diameter/2, cut_slot, thick + 2*eps]);