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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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#1
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![]() Hi folks I'm considering machining soft jaws for a pnuematic chuck to hopefully improve concentricity. If I wanted to grip bars from 50mm dia to about 10mm dia would three sets of jaws be enough? What I'm basically asking is are there any rules-of-thumb relating bar diameter and the amount of jaw contact / diameter? Regards Rob -- Rob Hammond |
#2
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How about improving your standard jaws. Many posts here about that! I hone
my hard jaws every couple of years and hols .005" which is good enough for me. I make soft jaws for each critical job that hold .0005". I bore soft jaws about .002" under dia of the workpiece. "Rob Hammond" wrote in message ... Hi folks I'm considering machining soft jaws for a pnuematic chuck to hopefully improve concentricity. If I wanted to grip bars from 50mm dia to about 10mm dia would three sets of jaws be enough? What I'm basically asking is are there any rules-of-thumb relating bar diameter and the amount of jaw contact / diameter? Regards Rob -- Rob Hammond |
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