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unusual callout

unusual callout

unusual callout


Does anyone know what this callout means ?


Any references to where it's defined will be appreciate it.

Thank you.

RE: unusual callout


Those things on the right appear to be orientation plane indicators, defined in ISO 1101. They seem to serve a purpose similar to ASME Y14.5 bidirectional positional tolerancing.

I'm far from an expert on the ISO side of things, so you probably shouldn't consider this a definitive answer.


RE: unusual callout


Thanks a lot for the information!!

I searched, and I found more info related to these ISO symbols.

Thank you again.

RE: unusual callout

How can this feature be perpendicular to A and also parallel to it?

John Acosta, GDTP Senior Level
Manufacturing Engineering Tech

RE: unusual callout

Quote (powerhound)

How can this feature be perpendicular to A and also parallel to it?

In absence of Diameter indicator this is, most likely, bi-directional position tolerance.
So, one direction across the river and the other parallel smile

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

RE: unusual callout

I agree it is bi-directional tolerating. See ISO 1101:2017 page 90 for the details

Certified Sr. GD&T Professional

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