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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.
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Allowance
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A tolerance specificed by the designer that permits a dinesnion variabios in two directions.
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Bilateral tolerance
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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.
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Circularity
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The condition where two or more features (holes or diameters) have a common axis.
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Concentricity
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The maximum "intentional" difference between the size of mating parts.
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Clearance
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A condition of a surface where all points on that surface are of equal distance from the axis of that surface.
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Cylindricity
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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.
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Datum Reference
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The heart of the Geometric Dimensioning and Tolerancing system.
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Feature Control Symbol/Frame
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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.
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Least Material Condition (LMC)
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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.
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Maximum Material Condition (MMC)
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A dimension found on a blueprint or drawing that is not to scale with the rest of the drawing. Normally displayed with an underline.
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Not To Scale Dimension
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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.
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Projected Tolerance Zone
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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.
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Regardless Of Feature Size (RFS)
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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)
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Total Indicator Reading (TIR)
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