module motor_part_J() color("blue") difference(){
    union(){

        //translate([0,0,-12]) difference(){
            //cylinder(r=23,h=28);
            //translate([0,0,-1])cylinder(r=21,h=55);
            //translate([0,0,28]) rotate([0,-27,0])cube([70,60,22],center=true);
            //translate([0,0,-6]) rotate([0,-25,0])cube([60,60,20],center=true);
        //}

        scale([1,1.55,1]) translate([23,0,0]) rotate([0,90,180]) difference(){
            cylinder(r=13.5,h=46);
            translate([0,0,-1])cylinder(r=12,h=85);
            translate([0,0,48]) rotate([0,-50,0])cube([80,60,22],center=true);
            rotate([0,-90,0]) translate([23,0,-20]) cylinder(r=10,h=50);
            //translate([0,0,-1]) rotate([0,-45,0])cube([80,60,22],center=true);
        }
        for(i=[1:4])rotate([i*90,0,0]) translate([20,0,10]) rotate([0,90,0]) difference(){
            cylinder(r=4.5,h=6,center=true);
        }
        for(i=[-1,1]) translate([12*i,0,0]) translate([0,0,-9]) cube([1.5,24,6],center=true);
        translate([0,0,-10]) rotate([0,90,0]) difference(){
            cylinder(r=4.5,h=46,center=true);
        }
        translate([20,0,0]) rotate([0,90,0]) difference(){
            cylinder(r=8,h=6,center=true);
            cylinder(r=6,h=11,center=true);
        }
        for(i=[1:4]) rotate([0,0,i*90+45]) translate([17,0,-9]) cylinder(r=3.5,h=6,$fn=18,center=true);
    }
    translate([0,0,-6]) cylinder(r=16,h=50);
    for(i=[1:4]) rotate([0,0,i*90+45]) translate([17,0,-8]) cylinder(r=1.5+k,h=15,$fn=18,center=true);
    for(i=[1:4])rotate([i*90,0,0]) translate([0,0,10]) rotate([0,90,0]) cylinder(r=2.5,h=60,center=true);

}