GD&T Symbols Reference - Sigmetrix

1 GD&T Symbols Reference GD&T Control Name Summary Description Symbol Type Controls the straightness of a feature in relation to its own perfect Form Straightness form Form Flatness Controls the flatness of a surface in relation to its own perfect form Controls the form of a revolved surface in relation to its own Form Circularity perfect form by independent cross sections Form Cylindricity Like circularity, but applies simultaneously to entire surface Profile of a Controls size and form of a feature. In addition it controls the Profile Surface location and orientation when a datum Reference frame is used. Profile Profile of a Line Similar to profile of a surface, applies to cross sections of a feature Controls the orientation of a feature which is nominally Orientation Perpendicularity perpendicular to the primary datum of its datum Reference frame Controls orientation of a feature at a specific angle in relation to Orientation Angularity the primary datum of its datum Reference frame Controls orientation of a feature which is nominally parallel to the Orientation Parallelism primary datum of its datum Reference frame Controls the location and orientation of a feature in relation to its Location Position datum Reference frame Location Concentricity Controls concentricity of a surface of revolution to a central datum Location Symmetry Controls the symmetry of two surfaces about a central

2 datum Controls circularity and coaxiality of each circular segment of a Runout Circular runout surface independently about a coaxial datum Controls circularity, straightness, coaxiiality, and taper of a Runout Total runout cylindrical surface about a coaxial datum SEE WHAT YOU'RE MISSING Copyright Sigmetrix , LLC. GD&T Symbols Reference Symbol Meaning Symbol Meaning LMC Least Material Condition Dimension Origin MMC Maximum Material Condition Counterbore Tangent Plane Countersink Projected Tolerance Zone Depth Free State All Around Diameter Between Radius Target Point Spherical Radius Conical Taper Spherical Diameter Slope Controlled Radius Square Statistical Tolerance {77} Basic Dimension (77) Reference Dimension 5X Places Our GD&T Advisor software solution provides the automation you need to make manual GD&T methods a thing of the past!

3 This unique, state-of-the-art solution accelerates the design process, saving valuable time, and reduces the manufacturing costs like scrap and change orders, saving thousands of dollars every year. This Reference guide brought to you compliments of Sigmetrix the world leader in tolerance analysis and design optimization solutions. To learn more about the GD&T Advisor solution or any of our tolerance analysis software and services, contact us at SEE WHAT YOU'RE MISSING Copyright Sigmetrix , LLC.