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A half-circle, open or closed, controlling a whole shape.
Also known as: Profile of a surface, Profile of a line
Profile tolerances control an entire surface or line against its theoretical shape, and can substitute for almost every other characteristic. Two versions exist: profile of a line, drawn as an open arc, and profile of a surface, drawn as an arc on a base line.
Control the whole form of a line or a surface against its theoretically exact shape, rather than one geometric property.
Contexts: Technical drawing
Come in two forms — profile of a line and profile of a surface — distinguished by whether the arc sits on a base line.
Contexts: Technical drawing
Can control form, orientation and location together when a datum is referenced, which is why modern practice uses them in place of several separate callouts.
Contexts: Technical drawing
A semicircular arc, either open or standing on a short horizontal line, drawn in a rectangular frame.