Basically a 1 off Part of my thinking about coal fired in a pit with ducked air from underneath.
the weight of the casting is not as much as you might think since the rim with the teeth is about 2 inches thick the hub is 5 inches in diameter with a 3 inch diameter center bore and 4 inches thick the web between the hub and teeth is 1 inch thick so overall the total weight is around 75 lbs. Easily lifted by 1 hand but since it would be red hot I was thinking along the lines of a 2 man crucible tong
for an anvil as such I have a weldement that has a 5 inch thick plate about the same out side dimensions as the sprocket with a 7 inch center bore and a 26 inch diameter 6 inch tall base under it it also has a vertical column about 3 ft tall off to 1 side I was planning on welding a second column to the opposite side then a section of 10" 100 lb per ft wide flange beam to the top of the columns Additionally I have a 12 inch diameter 1 inch wall pipe that has a 2 inch thick cap welded to it this would allow me to make a press which would press on the web using my 50 ton bottle jack then it would be a matter of sledge hammering the rim straight I may have to have one person keep waving my 10 rose bud oxy act torch around the sprocket while I have it pressed and beating it into submission But I believe it to be do able as I have done larger things in the past using as many as 4 torches but they sucked large bottles of oxygen and acetylene dry
After I have it straight I will have to re heat the rim and teeth at least to a dull cherry then spin quench to re harden the teeth