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+-- Thread: Fractional digital caliper question (/showthread.php?tid=7366619)
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Fractional digital caliper question - Pirate - 12-16-2021
When I read my fractional, dial caliper, graduated in1/64 of an inch, it might read 1/64 and a little bit, like 2/3 the way to 2/64. I call it 1/64 and 2/3
How would a digital fractional caliper read this measurement?
Thanks. Sorry if a digital caliper is considered a power tool!
RE: Fractional digital caliper question - pprobus - 12-17-2021
(12-16-2021, 10:45 PM)Pirate Wrote: When I read my fractional, dial caliper, graduated in1/64 of an inch, it might read 1/64 and a little bit, like 2/3 the way to 2/64. I call it 1/64 and 2/3
How would a digital fractional caliper read this measurement?
Thanks. Sorry if a digital caliper is considered a power tool!
I am sorry, I do not know. I do have one or more digital calipers that can read in fractions, but I usually only use the decimal and convert to the nearest 64th through math. That allows me to choose which 64th to use if the reading falls between.
RE: Fractional digital caliper question - Philip1231 - 12-17-2021
If it is a relative measurement, I will do the same thing: comparing two parts to make sure they are identical, each be X + some fraction of a 64th. We know that 1/64 is roughly .015 so at times this number pops into my head when dealing with fractions of a 64th. For absolute measurement, I go to the dial caliper graduated in 1000'ths, but that is very rare, for WW at least, unless we are talking machine setup. I use the Starrett fractional dial caliper and it is almost never not on my bench.
![[Image: 2ZUE6_2?hei=536&wid=536&%24adapimg%24=]](https://static.grainger.com/rp/s/is/image/Grainger/2ZUE6_2?hei=536&wid=536&%24adapimg%24=)
RE: Fractional digital caliper question - Roly - 12-17-2021
(12-16-2021, 10:45 PM)Pirate Wrote: When I read my fractional, dial caliper, graduated in1/64 of an inch, it might read 1/64 and a little bit, like 2/3 the way to 2/64. I call it 1/64 and 2/3
How would a digital fractional caliper read this measurement?
Thanks. Sorry if a digital caliper is considered a power tool!
1/64" divided by 3 times 2 =0.0104166666666667" It would probably read it as 0.105" Roly
RE: Fractional digital caliper question - R Clark - 12-18-2021
(12-16-2021, 10:45 PM)Pirate Wrote: When I read my fractional, dial caliper, graduated in1/64 of an inch, it might read 1/64 and a little bit, like 2/3 the way to 2/64. I call it 1/64 and 2/3
How would a digital fractional caliper read this measurement?
Thanks. Sorry if a digital caliper is considered a power tool!
My iGaging digital caliper will read in 128ths. The situation you describe will be read as 3/128ths.
If I'm working to that kind of tolerance, I'll be working in thousandths and use the caliper in decimal mode instead of fractional.
RE: Fractional digital caliper question - cputnam - 12-19-2021
Being more than the average in terms of shaky hands and general clumsiness, I just assume that numbers less than 1/64" are in the error zone. Takes multiple measurements, all with the same result, for me to believe the number. YMWV
RE: Fractional digital caliper question - rwe2156 - 12-20-2021
I often use a fractional dial caliper. Actually I love it.
If I use a digital, most of the time its in metric, sometimes in decimal inches, but NEVER in fractions the 128th's drive me nuts.
In ww'ing all measurements are relative. :-D
RE: Fractional digital caliper question - cams2705 - 12-20-2021
(12-16-2021, 10:45 PM)Pirate Wrote: When I read my fractional, dial caliper, graduated in1/64 of an inch, it might read 1/64 and a little bit, like 2/3 the way to 2/64. I call it 1/64 and 2/3
How would a digital fractional caliper read this measurement?
Thanks. Sorry if a digital caliper is considered a power tool!
If it is reading the full 1/64" + 2/3 of the way to the 2/64" (aka 1/32) ...
Then you have to figure you are looking for 64ths broken down into 3's ...
1 inch would then be broken down into 192nds (64 * 3 = 192) ...
Your 1/64" is 3/192nds and the 2/3ds of the next 64th is another 2/192nds = 5/192nds or 0.0260"
RE: Fractional digital caliper question - toolmiser - 12-20-2021
I've tried a digital a few times and I don't like them. With a fractional dial caliper I don't have to think as much, and you know how much thinking hurts!
RE: Fractional digital caliper question - Pirate - 12-20-2021
I like the dial fractional caliper.