True Position call out...
True Position call out...
(OP)
Gentlemen,
I came across on a Diameter imension of 20,36 H7 and below is a true position call out to ABC under RFS because has no M encircle.
My question is what's the H7 means it has something to do with the true position?
Thank you.
I came across on a Diameter imension of 20,36 H7 and below is a true position call out to ABC under RFS because has no M encircle.
My question is what's the H7 means it has something to do with the true position?
Thank you.





RE: True Position call out...
For more details regarding ISO limits and fits system see to ISO 286:2010 (parts 1 and 2)
RE: True Position call out...
RE: True Position call out...
For what it's worth, the MMC modifier wouldn't add any appreciable position tolerance in this case (21 microns, as noted), but would allow for the use of hard gaging, which would make inspection much more straightforward on a production part.
If you're making more than a couple of these things, it'd be a worthwhile change to the print.
RE: True Position call out...