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A dimension that exactly locates a reference point, reference line, or reference plane

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11y ago

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What is a datum point in drawing?

We have to make some choices when we dimension a block with a notch or cutout. It is usually best to dimension from a common line or surface. This can be called the datum line of surface. This eliminates the addition of measurement or machining inaccuracies that would come from "chain" or "series" dimensioning.


What is the Definition of datums?

a theoretically exact point, axis, or plane derived from the true geometric counterpart of a specified datum feature. A datum is the origin from which the location or geometric characteristics of features of a part are established.


What is the definition of dimension?

A dimension is a measurable extent of some kind, such as length, breadth, depth, or height.


Can a reference dimension on an Engineering drawing be toleranced?

No, then it would not be a reference dimension. Reference dimensions by definition have no tolerance.


What does a reference symbol inside a basic dimension symbol mean?

A reference symbol inside a basic dimension symbol indicates that the dimension is referenced to a specific datum or feature in the design. This helps clarify the relationship between the dimension and the referenced feature, ensuring accurate interpretation and manufacturing. It enhances the precision of technical drawings by providing context for where the measurement is taken from.


What is the definition of 2-D shapes?

2d shape is a dimension


Is datum the plural of data?

Datum is not the plural of data. Datum is singular, and its plural form is data.


3. What is the difference between chain dimensioning and datum dimensioning?

Chain dimensioning involves placing dimensions in a linear sequence, where each dimension is referenced from the previous one, which can lead to cumulative tolerances and potential inaccuracies. In contrast, datum dimensioning establishes a reference point or surface (datum) from which all other dimensions are measured, ensuring consistency and precision across the entire part. This method reduces the accumulation of tolerances and enhances the reliability of the dimensions. Overall, datum dimensioning is generally preferred for critical applications where accuracy is paramount.


What is hydrography datum?

Correction: What is hydrographic datum? not "hydrography"


What is the definition of linear dimension?

The meaning of linear dimension is to measure in a straight line with the units. Which are Kilometer, Meter, decimeter, centimeter and lastly millimeter.


What is datum in design?

datum is the plane in which we can sketch any thing thing


What is a wine bottle datum?

sorry but i don't think there is something as datum