GDT:Profile of a Surface
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Revision as of 21:29, 14 January 2026 by Admin (talk | contribs) (Created page with "{{Author Credit |author=Admin }} {{GDT Infobox |symbol=Profile of a Surface |type=Profile |category=Profile |standard=ASME Y14.5 |author=Admin |datums=Optional, based on how the true profile is located |modifiers=Dynamic profile, non-uniform, tangent, unequal, free state, ST where allowed |tolerance_zone=Uniform boundary about the true surface |image=<!-- TODO: add diagram file name --> |mistakes=Missing basic/toleranced location; using pro...")
| Symbol | Profile of a Surface |
|---|---|
| Type | Profile |
| Category | Profile |
| Standard | ASME Y14.5 |
| Author | Admin |
| Datums | Optional, based on how the true profile is located |
| Modifiers | Dynamic profile, non-uniform, tangent, unequal, free state, ST where allowed |
| Tolerance zone | Uniform boundary about the true surface |
| Image | |
| Common mistakes | Missing basic/toleranced location; using prohibited modifiers; misusing datum surfaces |
| Related | F4:Profile of a Surface Validation |
Summary
Profile of a surface controls the 3D form of a surface relative to its true profile.
Definition
The tolerance zone is a uniform boundary about the true profile surface. The entire surface must lie within this zone.
When to use it
Use profile of a surface to control complex surfaces where both form and location must be managed together.
Examples
Example: Surface profile with datums
Profile of a surface applied to a contoured face located by basic dimensions and datums.
Common mistakes
- Not locating the true profile with basic or toleranced dimensions.
- Applying the profile to a datum surface in an ambiguous way.
- Using prohibited modifiers.