Odd metric thread call out
Odd metric thread call out
(OP)
I have a M10 x 1.1 6g thread to call out on a drawing.
Has anyone seen a chart with major/minor/pich diameter tolerances for such a thing?
Has anyone seen a chart with major/minor/pich diameter tolerances for such a thing?





RE: Odd metric thread call out
www.fixingsupplies.co.uk/Metric2.pdf
1.1 pitch is not a standardized value.
RE: Odd metric thread call out
In the meantime I did find a trial version of software that accepted a 1.10 pitch variable. Don't know how to verify the results though.
http://closetolerancesoftware.com/METhreadPal.html
RE: Odd metric thread call out
Whilst it might look perfect on a thread gauge what state is the thread in? If it is worn or stretched the difference between 1.1 and 1.12 (0.0007") would be fairly hard to see using a thread gauge.
It is hard to think, but obviously not impossible, that someone would go away from a standard thread to increase the pitch by only 0.02mm, assuming all the form is standard.
RE: Odd metric thread call out
In fact, metric pitch 1.1 mm doesn't exist.
Are you sure you are not dealing with British Standard Pipe Thread 1/8 28 threads per inch?
RE: Odd metric thread call out
RE: Odd metric thread call out
Japanese use both British-style threads and metric; in fact you can even assemble M10x1 with G1/8 if you try hard.
It still blows my mind that you managed to get 1.1 mm pitch gauge somewhere.
RE: Odd metric thread call out
RE: Odd metric thread call out
If it is for fine adjustment, makes me think of something exotic, like "microscope thread", but I am not very familiar with those.
You mentioned optical comparator; did you have a chance to verify thread being 60 deg and not 55 deg?
RE: Odd metric thread call out
I didn't do the measurement, and form angle wasn't brought up. If it was other than 60 I'm sure it would be mentioned but I'll verify that. I don't see how that would effect the pitch though. Unless there's a standard M10x1.1 55deg angle?
Never heard of a 55deg thread form
RE: Odd metric thread call out
I brought "microscope" because some of them combine metric OD with threads per inch pitch.
1.1mm pitch was used on outdated Lowenhertz presision thread, but with 7mm dia.
You can find few threads to look at here:
http://www.gewinde-normen.de/en/index.html
Good luck!
RE: Odd metric thread call out
Now where in the world did you find a 1.1 pitch thread gauge?
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Odd metric thread call out
A 24UN thread has a pitch of approximately 1.06mm.
Could this be a 0.4-24UN thread?
How about a 10mm-24UN thread?
RE: Odd metric thread call out
Got the handbook and could come up with the numbers if I actually knew what class the parts were made to. Given the unsualness of this thing I don't want to assume it's "preferred"
Got the gauge here:
http:
chckerhater >
Thanks. I missed the BSPT and whitworth 55deg thread form.
All this discussion sent me back to the inspection table and I measured the travel distance between the mating parts through 180deg rotation. .042-.043inch leans me to the 1.10mm pitch still.
I think we will order thread wires for both 1.10 and 1.12 pitch and try verify further.
RE: Odd metric thread call out
Non of the TPI gauges in the range fit completely.
RE: Odd metric thread call out
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Odd metric thread call out
RE: Odd metric thread call out