GD&T Symbols Reference Guide from Sigmetrix


Sigmetrix’s GD&T Advisor software provides designers and engineers technology integration with popular modeling systems using the current standard in variance GD&T Symbols. Therefore saving your company time and money in the long run.  Our software team not only provides  GD&T Advisor softwaretolerance analysis solutions , training and services.  Contact us now at info@sigmetrix.com.

In geometric dimensioning and tolerancing (GD&T), a unique set of GD&T symbols are used to define the relationships between part features and measurement references. Designers and engineers utilize this international language on their drawings to accurately describe part features on the basis of size, form, orientation and location.

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GD&T SymbolControl TypeNameSummary Description
GD&T Symbols StraightnessFormStraightnessControls the straightness of a feature in relation to its own perfect form
GD&T Symbols FlatnessFormFlatnessControls the flatness of a surface in relation to its own perfect form
Sigmetrix GD&T Symbols CircularityFormCircularityControls the form of a revolved surface in relation to its own perfect form by independent cross sections
Sigmetrix GD&T Symbols CylindricityFormCylindricityLike circularity, but applies simultaneously to entire surface
GD and T Symbol Profile of a SurfaceProfileProfile of a SurfaceControls size and form of a feature. In addition it controls the location and orientation when a datum reference frame is used.
GD and T Symbols Profile of a LineProfileProfile of a LineSimilar to profile of a surface, applies to cross sections of a feature
Sigmetrix GD and T Symbol PerpendicularityOrientationPerpendicularityControls the orientation of a feature which is nominally perpendicular to the primary datum of its datum reference frame
Sigmetrix GD and T Symbol AngularityOrientationAngularityControls orientation of a feature at a specific angle in relation to the primary datum of its datum reference frame
Sigmetrix GD and T Symbol ParallelismOrientationParallelismControls orientation of a feature which is nominally parallel to the primary datum of its datum reference frame
Sigmetrix GD&T Symbol PositionLocationPositionControls the location and orientation of a feature in relation to its datum reference frame
Sigmetrix GD&T Symbol ConcentricityLocationConcentricityControls concentricity of a surface of revolution to a central datum
Sigmetrix software GD and T symbol symmetryLocationSymmetryControls the symmetry of two surfaces about a central datum
Sigmetrix software GD and T symbol circular runoutRunoutCircular runoutControls circularity and coaxiality of each circular segment of a surface independently about a coaxial datum
Sigmetrix software GD and T symbol total runoutRunoutTotal runoutControls circularity, straightness, coaxiiality, and taper of a cylindrical surface about a coaxial datum

Our GD&T Advisor software solution provides the automation you need to make manual GD&T methods a thing of the past!

Sigmetrix’ 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. Each of our expertly designed software programs the internationally recognized GD&T Symbols throughout the modeling and reporting processes.

SymbolMeaning
GD&T Symbol Least Material ConditionLMC –
Least Material Condition
GD&T Symbol Maximum Material ConditionMMC –
Maximum Material Condition
GD and T Symbols Tangent PlaneTangent Plane
GD and T Symbols Projected Tolerance ZoneProjected Tolerance Zone
Sigmetrix GD&T Symbol Free StateFree State
Sigmetrix GD&T Symbol DiameterDiameter
Sigmetrix GD&T Symbol RadiusRadius
Sigmetrix software GD and T symbol Spherical RadiusSpherical Radius
Sigmetrix software GD and T symbol Spherical DiameterSpherical Diameter
Sigmetrix software GD and T symbol Controlled RadiusControlled Radius
GD&T Symbols Statistical ToleranceStatistical Tolerance
Sigmetrix GD&T Symbol Basic DimensionBasic Dimension
Sigmetrix GD&T Symbols Reference DimensionReference Dimension
Sigmetrix software GD and T symbol placesPlaces
SymbolMeaning
GD&T Symbols Dimension OriginDimension Origin
GD&T Symbols CounterboreCounterbore
Sigmetrix software GD and T symbol CountersinkCountersink
Sigmetrix software GD and T symbol DepthDepth
Sigmetrix GD and T All Around SymbolAll Around
Sigmetrix software GD and T Between symbolBetween
Sigmetrix software GD and T Target Point symbolTarget Point
GD and T Conical Taper SymbolConical Taper
GD and T Slope SymbolSlope
GD&T Square SymbolSquare

Sigmetrix is premier source for tolerance analysis and design optimization software, training, and engineering solutions. For more information about GD&T Advisor software or any of our tolerance analysis solutions and services,contact us at info@sigmetrix.com or  via our website here.