11-10-2012, 04:28 PM
The shaft on the back can be held in a drill chuck, for small knurls, or a turret. I normally just hold it in my tool post.
Mike: The easiest way is to use some O1 tool steel to make the holders. You might even be able to find some 5/8" square. Then, one the machining is finished, you just heat them up cherry red and quench them in oil. That will make them glass hard and likely to crack, so you can temper them by heating them with the torch just enough to burn the oil off.
Another and cheaper method is to make them out of mild steel and case harden afterward. Just heat them cherry red and dip in a case hardening compound (like Kasenit), then keep them red for a few minutes with the torch to give the carbon time to soak in, and water quench. No tempering is required because only the surface gets hard.
Tom
Mike: The easiest way is to use some O1 tool steel to make the holders. You might even be able to find some 5/8" square. Then, one the machining is finished, you just heat them up cherry red and quench them in oil. That will make them glass hard and likely to crack, so you can temper them by heating them with the torch just enough to burn the oil off.
Another and cheaper method is to make them out of mild steel and case harden afterward. Just heat them cherry red and dip in a case hardening compound (like Kasenit), then keep them red for a few minutes with the torch to give the carbon time to soak in, and water quench. No tempering is required because only the surface gets hard.
Tom
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