How tolerances and surface roughness map to GCDs¶
Each tolerance and roughness type applies only to certain types of Geometric Cost Driver (GCD) types. The table shows the types of tolerance that apply to each type of GCD. It also indicates which semantic tolerance data can be imported as PMI from CATIA™ V5, Creo®,NX™, and SOLIDWORKS™:
| Tolerance | Symbol | Curved Surface | Curved Wall | Keyway | Planar Face | Simple Hole | Complex Hole | MultiStep Holes | Edge / Edge-Segment | Bend (B&T) | Lance | Import from PMI? |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tolerance (coordinate) |  |
X | X | X | X | X | X | X | X | No | ||
| Roughness Ra |  |
X | X | X | Yes* | |||||||
| Roughness Rz |  |
X | X | X | Yes* | |||||||
| Diam Tolerance |  |
X | X | X | Yes | |||||||
| True Position |  |
X | X | X | X | X | Yes | |||||
| Bend Angle Tolerance |  |
X** | No** | |||||||||
| Circularity |  |
X | X | Yes | ||||||||
| Concentricity |  |
X | X | Yes | ||||||||
| Cylindricity |  |
X | X | No | ||||||||
| Flatness |  |
X | Yes | |||||||||
| Parallelism |  |
X | X | X | X | Yes | ||||||
| Perpendicularity |  |
X | X | X | Yes | |||||||
| Profile of Surface |  |
X | X | X | Yes | |||||||
| Runout |  |
X | X | X | Yes | |||||||
| Total Runout |  |
X | X | Yes | ||||||||
| Straightness |  |
X | X | X | X | Yes | ||||||
| Symmetry |  |
X | X | X | X | X | Yes |
* PMI cannot be imported from SolidWorks™.
** CAD Angularity GD&T callout maps to Bend GCD in Bar & Tube only. Entered manually only.