johnsmachines

The aluminium disk was drilled then reamed to 19.05mm (3/4″)

Then a shaft was pressed into the disk. The shaft is the same as the shaft on the beam engine, in fact it is from the same stock. It was centre drilled at the ends in preparation for turning between centres, and shaping the driving wheel.   This should result in a wheel which runs true and does not wobble when installed onto the beam engine.