330 Geometric Dimensioning and Tolerancing Profile of Conical Features A profile tolerance can be used to control the form, or form and orientation, of a conical surface. The feature can be controlled independently as a refinement of size or it can be oriented to a datum axis. In either case, the profile tolerance must be within the size tolerance. Conical profile requires that the actual surface lie between two coaxial boundaries equal in width to the specified geometric tolerance, having a basic included angle, and within the size limits. (Coaxial means having the same axis.) Refer to Example 9-17. Composite Profile Tolerance A composite profile tolerance provides for the location of a profiled feature and, at the same time, the control of form and orientation. This is done by doubling the height of the feature control frame that points to the feature to be controlled. The profile geometric characteristic symbol is placed in the first compartment. The top Actual surface True profile 0.1 wide profile tolerance zone Datum plane B Datum plane A 60 110° The Drawing The Meaning Example 9-16. Specifying the profi le of an inclined planar surface.