ZY/MY 6812 Electric Motor - belt drive sprocket removal

The belt drive sprocket was firmly fixed to the shaft so a home made extractor was needed!

Uni-strut slot cutout to slide under the sprocket and then a bolt tightened down against the top of the shaft forcing the sprocket up

Here you can see the grooves inside the sprocket.   The shaft has splines going down each side of it so I assume its heated and forced on.