// Rad mit Aussparungen

difference(){
    cylinder(d=100,h=10, center=true);
    translate([25,0,0])
        cylinder(d=20, h=11, center=true);
    rotate([0,0,360/5])
        translate([25,0,0])
            cylinder(d=20, h=11, center=true);
    rotate([0,0,2*360/5])
        translate([25,0,0])
            cylinder(d=20, h=11, center=true);
    rotate([0,0,3*360/5])
        translate([25,0,0])
            cylinder(d=20, h=11, center=true);
    rotate([0,0,4*360/5])
        translate([25,0,0])
            cylinder(d=20, h=11, center=true);
}