1) I had an old electric grinder that no longer worked. I stripped out the electrics & removed parts of the grinder housing. 2) I removed the pulley drive from an old Singer sewing machine & fitted it to one end of the grinder. It was not the right size, so I had to make up some copper shims to make the pulley fit. 3) I mounted the grinder on the Singer sewing machine treadle base.