True Position ISO 2768-m

I am currently programming a job from drawing with a hole with no true position specified, it has boxed dimensions which would imply a true position. I've notified the customer to ask what the true position would be and they said I should be able to get the true position from the ISO Spec?

To my knowledge the ISO specification used being ISO 2768-m does not specify a true position to use for boxed dimensions with no positional tolerance, this is usually illustrated on the drawing in a tolerance frame around the hole call out? I'm looking to reply with words to that effect, am I right to say this?

I've checked the standard and I can't see anything on this, any advice would be greatly appreciated

(see attached image)

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Wes Cisco over 8 years ago

I left Alex Krulikowski's wonderful book at my previous employer. They paid for it after all. I think if you dig enough you will find that ISO 2768-m on the drawing automatically invokes other ISO standards, one of which is 2768k that as Jeffman and Ninjabadger mention, invokes some geometric controls as "general workmanship". I don't recall true position being one of the, more like flatness, parallelism, etc, but I am far from certain about this.

HTH
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Wes Cisco over 8 years ago

I left Alex Krulikowski's wonderful book at my previous employer. They paid for it after all. I think if you dig enough you will find that ISO 2768-m on the drawing automatically invokes other ISO standards, one of which is 2768k that as Jeffman and Ninjabadger mention, invokes some geometric controls as "general workmanship". I don't recall true position being one of the, more like flatness, parallelism, etc, but I am far from certain about this.

HTH
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