Another GD&T question

[Perry Fisher]

Hello folks,

I'm preparing to program a series of parts that are dimensioned almost exclusively with basic dimensions and profiles. This is not a problem. What I'm unsure of is the General Tolerance callout being a profile to surface.

We have never had parts dimensioned in this manner. How should this be intrepreted?

Thanks

PF

[BSchwark]

Is this a "Cat" print?

BS

[Perry Fisher]

If you are refering to Caterpillar, no but it is an automotive part.

[DaddyBluto]

When I worked for a company making cast parts for Chrysler they would have us set up to the datums and just coat the part in profile points. We would just report each point with ± half the profile. This covered shape and stock. It was rare that they would ask for any linear dimensions.

[JamesMannes]

As DADDYBLUTO stated that's what we do also.

[Perry Fisher]

That is how I was thinking but it is always reassuring to get the opinion of the Big Dog Experts on this board.

Thanks

[Rick Coleman]

Automotive stampings here. You might want to ask if there is any number max/min to meet their requirements. Usually we've been able to get by with several points reporting the surface features (forms), maybe a bridge across a couple cross sections. Trims or profile, everybody has seemed to be happy with 25 to 50mm spacing.