EMAE 160 GD&T Symbol Flashcards

Straightness

form, controls the straightness of a feature in relation to its own perfect form

Flatness

form, controls the flatness of a surface in relation to its own perfect form

Circularity

form, controls the form of a revolved surface in relation to its onw perfect form by independent cross sections

cylindricity

form, like circularity, but applies simultaneously to entire surface

Profile of a surface

profile, controls size and form of a feature. in addition, it controls the location and orientation when a datum reference frame is used.

profile of a line

profile, similar to profile of a surface, applies to cross sections of a feature

perpendicularity

orientation, controls the orientation of a feature which is nominally perpendicular to the primary datum of its datum reference frame

angularity

orientation, controls orientation of a feature at a specific angle in relation to the primary datum of its datum reference.

parallelism

orientation, controls orientation of a feature which is nominally parallel to the primary datum of its datum reference frame

position

location, controls the location and orientation of a feature in relation to its datum reference frame

concentricity

location, controls concentricity of a surface of revolution to a central datum

symmetry

location, controls the symmetry of two surfaces about a central datum

circular runout

runout, controls circularity and coaxiality of each circular segment of a surface independently about a coaxial datum

total runout

runout, controls circularity, straightness, coaxiality, and taper of a cylindrical surface about a coaxial datum