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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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are they for real ?
$89 gets u a set with that, plus base, arms and 1" dial digital indicator. Right on their home page ... There's probably 2 shops in the whole nation that can hold these types of tolerances, but still I am sure many of us wouldn't mind having 5 h-th of resolution. |
#2
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![]() "rashid111" wrote in message ups.com... are they for real ? $89 gets u a set with that, plus base, arms and 1" dial digital indicator. Right on their home page ... There's probably 2 shops in the whole nation that can hold these types of tolerances, but still I am sure many of us wouldn't mind having 5 h-th of resolution. That they can resolve to .00005" through circuitry in no way means that they will be capable of making measurements to the same degree of resolution. My personal opinion is that they would be worthless for that purpose. Calipers are prone to considerable error----often not able to resolve to a thou, regardless of the capabilities of the electronics. There's too much mechanical error in them----including variations from inside/outside jaws, and springing of the jaws. Holding tight tolerance isn't beyond the capability of many shops. I've worked as closely as .000020", but I had the luxury of a certified secondary standards lab at my disposal to do the measuring. It's almost impossible for the normal shop to measure that close. I drew the line at .0001" tolerance when I ran my commercial shop. Anything closer than that was no-bid, citing my lack of ability to measure reliably. Harold |
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