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Toolmaker Teacher
Toolmaker Teacher
10
Education
Undergraduate 1
02/07/2007

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Term
American National Standards Institute(ANSI)
Definition
A set of drafting standards which are recommended for drawing practice.
Term
Datum
Definition
A point, line, plane, or other geometric surface from which dimentions are measured when so specified or to which geometric tolerances are referenced.
Term
Datum Feature
Definition
A feature of a part, such as the edge or a surface, which forms the basis for a datum or is used to establish its location.
Term
Dimention
Definition
A geometric characteristic, of which the size is specified, such as diameter, length, angle, location, or center distance.
Term
Feature Control Frame
Definition
A box found on engineering drawings, that is divided into compartments containing the geometric characteristic symbol followed by the tolerance.
Term
Geometric Tolerance
Definition
The maximum permissible variation of form, profile, orientation, location, and runout from that indicated or specified on the drawing.
Term
Least Material Condition (LMC)
Definition
Refers to the size of a feature which results in the part containing the minimum amount of material.
Term
Maximum Material Condition (MMC)
Definition
When a feature or part is at the limit of size which results in it containing the maximum amount of material.
Term
Tolerance Value
Definition
This represents the width or diameter of the tolerance zone, within which the point, line, or surface of the feature shall lie.
Term
Virtual Condition
Definition
Refers to the overall envelope of perfect form within which the feature would just fit.
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