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14 Cards in this Set

  • Front
  • Back
The tolerance that permits two parts to be assembled with either a clearance or interference fit between parts.
Allowance
A tolerance specificed by the designer that permits a dinesnion variabios in two directions.
Bilateral tolerance
The surface condition of a feature where all elements in a cross-sectional measurement must be an equal distance from the axis within the limits of a specified tolerance during one complete revolution.
Circularity
The condition where two or more features (holes or diameters) have a common axis.
Concentricity
The maximum "intentional" difference between the size of mating parts.
Clearance
A condition of a surface where all points on that surface are of equal distance from the axis of that surface.
Cylindricity
The letters in the Feature Contro Frame that identify the line, survace, edge or point that is used as the reference point of origin for dimensions.
Datum Reference
The heart of the Geometric Dimensioning and Tolerancing system.
Feature Control Symbol/Frame
A modifier that is specified with tolerances and datums. It means the condition in which a part or feature contains the least amount of material; for example, the smallest pin size or the largest hole size.
Least Material Condition (LMC)
A modifier that is specified with tolerances and datums. It means the condition in which a part or feature contains the maximum amount of material; for example, the largest pin size or the smallest hole size.
Maximum Material Condition (MMC)
A dimension found on a blueprint or drawing that is not to scale with the rest of the drawing. Normally displayed with an underline.
Not To Scale Dimension
In G.D.T., a zone specified for a given height above a hole in which a pin, cap, screw, bolt, etc. is to be installed.
Projected Tolerance Zone
This term is a modifier that is specified with tolerances and datusm. It means that, regardless of the actual feature or datum of size, the stated feature tolerance applies.
Regardless Of Feature Size (RFS)
A runout tolerance of the permissible error in the desired part surface during a complete 360 degree revolution of the part around a datum axis. Also called "Full Indicator Movement" (FIM)
Total Indicator Reading (TIR)