tipR = 70/2; // 95/2
baseR = 10;
length = 20;
thickness = 3;

connectorInnerR = 6/2;
connectorOuterR = 18/2;
connectorLength = 8;
connectorScrewD = 3.75; //4mm screws

shaftLength = 11.5;
shaftBaseToFlat = 1;
shaftFlat = 4;


difference() {
    cylinder(r=connectorOuterR, h=connectorLength); // connector outer
    translate([0,0,-0.01]) // connector inner
        cylinder(r=connectorInnerR, h=shaftLength); // axel hole
        translate([0,0,shaftBaseToFlat + shaftFlat/2]) { // screw holes
        rotate(90, [1,0,0])
            cylinder(d=connectorScrewD, h=connectorOuterR + 0.1);
        rotate(90, [0,1,0])
            cylinder(d=connectorScrewD, h=connectorOuterR + 0.1);
    }
}

difference() { //cone
   translate([0,0,connectorLength]) // outer
        cylinder(r1=connectorOuterR, r2=tipR+thickness, h=length + (shaftLength - connectorLength));
   translate([0,0,shaftLength]) // inner
        cylinder(r1=baseR, r2=tipR, h=length + 0.01);
}