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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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Drill bit terms -- what do they mean
I would like to know what the terms jobbers length, taper and screw
machine mean with respect to drill bits. thanks, al |
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