This will (hopefully) be a durable tap that will be used many times. I've already started. I'm using mystery metal out of my scrap box. I think it might be stress proof because it is marked "SP" on one end.
I cut the square head on the mill using my index head. I turned down the shaft and am now starting on the threads. I'll put a taper on the end then mill two flutes. I'm thinking on cutting the relief with a file. Then heat to cherry red and quench in water.
If it turns out I'll post pictures.
I cut the square head on the mill using my index head. I turned down the shaft and am now starting on the threads. I'll put a taper on the end then mill two flutes. I'm thinking on cutting the relief with a file. Then heat to cherry red and quench in water.
If it turns out I'll post pictures.