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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Carbon steel taps vs HSS for gunsmithing?
A guy just emailed me to comment on my "taptips" page,
http://www.spaco.org/taptips.htm I said that I don't allow any (plain)carbon steel taps in my shop. He commented that gunsmiths DO use carbon steel taps because they tend to break a lot, but are easy to remove by smashing them. I don't do any gunsmithing- the idea of drilling into someone's gun barrel scares the dickens out of me. But here's my question: Isn't maybe, the REASON the little taps break often that they ARE carbon steel? And just for information, how DO you tap a 2-56 or 4-40 or whatever hole in a gun barrel? If you can only go 2 or 3 threads deep, you can't start with a taper or even a plug tap, can you? Are gun barrels hardened/hardened and tempered or are they just an annealed, tough steel like 4140? Pete Stanaitis --------------- |
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