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Doublereed Archive - Posting 000095.txt from 2008/02

From: herb fawcett <herbgosia@-----.net>
Subj: Re: [DR-L] Micrometer question
Date: Sat, 16 Feb 2008 00:48:58 -0500

Agreed, there are those of us who understand micrometer to mean the little
gadget with a C-shaped work area and a twist of the handle to measure
things. But then, a micrometric caliper (or micrometer-caliper) could be
what you refer to as a Vernier caliper. My dial guage caliper does not have
a Vernier scale, while my metric Boley caliper does have a Vernier scale.
Neither is what I used to call a micrometer, but each is indeed different
and by definition is micrometric in function. Ach, they are just words - we
must have consensus as to what the words mean, if anything. Measuring cane
to 0.0001" is an exercise in frustration anyway. Too much compression for
that level of accuracy.
Enjoy!
Herb

On 2/15/08 7:15 PM, "Dennis Thiel" <dathiel@-----.au> wrote:

> Herb,
> Let's really get down to earth.
> The question asked, was ... how to determine the accuracy of
> micrometers. Now we find that the questioner was really talking about
> dial gauge indicators .... as different from micrometers as are bassoons
> from pianos, (though they both play musical notes). The words Dial,
> Gauge or Indicator were not used in the original question.
> A micrometer is a micrometer ... a dial gauge indicator is a dial gauge
> indicator and a vernier caliper is a vernier caliper. All are of totally
> different design and construction, but they all measure fine dimensions,
> in their own way. They are also adjusted entirely differently.
> End of subject, surely.
>
> Dennis.
> ------------------------------------------------------------------------
>
> herb fawcett wrote:
>> Well, we could all refer to Mortimer J. Adler for a... long essay on the
>> real
>> meaning of any word, but then where would we go? Isn't this a bit of
>> thin-skinned casuistry?
>> A micrometric caliper can be read directly, by analog gauge, or digitally.
>> There are several types.
>>
>> Herb
>>
>>
>> On 2/15/08 4:58 AM, "David Lurie" <klingsor@-----.com> wrote:
>>
>>
>>> I call them micrometers because that's how they are described in the
>>> all the many catalogs that I reviewed. Then, everyone else calls them
>>> micrometers. They also measure in tiny fractions of a millimeter -
>>> hence "micro/meter" or micrometer.
>>>
>>> As far as I can tell, "dial indicator" is one type of micrometer out
>>> of several. It implies that it has a dial which reads out the
>>> measurement. So I think I did use the correct terminology and that
>>> your implication I used the wrong name is not right. If I am wrong
>>> about this, I will of course be willing to be corrected.
>>>
>>> David
>>>
>>> At 10:55 PM 2/14/2008, you wrote:
>>>
>>>> Then, why call them Micrometers? Good idea to get to know your tools
>>>> ... at least by name.
>>>> My previous reply may help someone in trouble with zeroing a real
>>>> Micrometer.
>>>>
>>>> Dennis.
>>>> ------------------------------------------------------------------------
>>>>
>>>> David Lurie wrote:
>>>>
>>>>> Hi David
>>>>>
>>>>> Both are dial indicators.
>>>>>
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