Legality
Legality
(OP)
Friday’s question: see attachment.
Don’t ask if is functional callout.
I am interested if the callout is legal per Y14.5-1994 standard (or per Y14.5-2009).
Should be an easy question: yes or no.
Thank you
Don’t ask if is functional callout.
I am interested if the callout is legal per Y14.5-1994 standard (or per Y14.5-2009).
Should be an easy question: yes or no.
Thank you





RE: Legality
If it is greater than .020, the requirement defined in the FRTZF may mean nothing for actual sizes allowing bonus tolerance to be greater than .020.
I would not however say it is illegal - at least in my opinion it does not violate any rule of composite positional tolerancing.
RE: Legality
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Legality
Exactly for the reason that FRTZF value may become larger, I wouldn't recommend anyone to use it. But I couldn't find anything explicitly forbidding the technique.
RE: Legality
No one is going to come and throw you in jail for using a bad GD&T calllout.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
RE: Legality
Napoleon used to say: "Every private in the French army carries a field-marshal's baton in his knapsack."
Every GD&T "expert" is a wannabe lawyer.
RE: Legality
Your tolerance box can be interpreted as per ASME Y14.5M-1994. The top tolerance box even makes sense to me. You are specifying the accuracy with which a hole pattern is located. This does not require MMC. Your second box ensures that screws pass through the holes. MMC now is a useful concept.
When you say "legal", I have visions of Captain GD&T smashing his way into your office and hurling a mouse pad at you.
--
JHG
RE: Legality
RE: Legality
So, the conclusion is:
It is ALLOWED or WITHIN THE SCOPE of the standard (legal)
Pmarc,
Quote: "What is total size tolerance for features controlled by this callout?
If it is greater than .020, the requirement defined in the FRTZF may mean nothing for actual sizes allowing bonus tolerance to be greater than .020."
The size is within ±.005, so, total size tolerance is .010 for features controlled by the callout.