Keithorr,
Thanks for the reply. These are already hard. They are 1.5 inch balls. Could I anneal them , drill and thread and then harden again? I have a small electric furnace that I melt and cast aluminum with that will get up around 1200 degrees. Would that be enough to anneal? Then drill and tap. Put back in furnace and heat again and immerse in oil to temper? How much warping or out of roundness do you think I would get doing this? |