Re: [ATM] Dial Indicators

[Jarvis Krumbein <jkoptic@juno.com>]

Jim, any one of these, including the Chinese will do for a basic Foucault
tester.  1" travel is good and as long as you remember to make your
readings with the tester always moving in the same direction you'll do
fine.  A dial indicator that reads to .0001 would be great except that
there always have a limited range, usually +/- .02 so that their
usefulness is limited.

Jarvis Krumbein

On Mon, 15 Aug 2005 11:18:40 -0700 (PDT) James Johnson
<jameswilliamjohnson@yahoo.com> writes:
> I am looking to purchase a dial indicator for a
> Foucault tester I am building. I have found 3
> manufacturers (on EBay) - Westward, Fowler and Chicago
> Dial Indicator Company. These have 1" travel, 2 - 2
> 1/2" dials and 0.001" precision. I couldn't bear to
> buy the cheaper Chinese models. Can anyone comment on
> which of these three would be the best? Or perhaps,
> for this purpose, the cheaper Chinese dial indicators
> will be OK?
> 
> After a 25 year haitus, I have purchased 6, 7 and 8"
> used pyrex blanks to start making (practicing) mirrors
> again. 
> 
> Thanks,
> Jim Johnson
> 
> 
> 		
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