difference(){
cylinder(h=hubaxlelen, r=axlerad+hublwidth);
translate([0,0,-1]) cylinder($fn=60, h=hubaxlelen+2, r=axlerad);
}
hole = hubeffrad - hubbigrad - DoveClip_depth() - hublwidth*2;
difference(){
cylinder(h=hubaxlelen, r=axlerad+hublwidth);
translate([0,0,-1]) cylinder($fn=60, h=hubaxlelen+2, r=axlerad);
}
hole = hubeffrad - hubbigrad - DoveClip_depth() - hublwidth*2;