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WorksheetsDimensioning
Total questions: 21
Worksheet time: 11mins
Include every dimension and notation provided on the designer’s sketch (or other form of input). If you have questions about the completeness of dimensions, consult the designer.
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Don't
Use the same precision (number of decimal places) identified by the designer when specifying dimension values.
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Use the datums identified on the designer’s input when placing dimensions.
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Dimension to features in their profile (or most descriptive) view.
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Follow ASME Y14.5-2009 spacing guidelines and dimension settings.
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Place dimensions applying to two views between the views, but project extension lines from only one of the views.
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Describe a hole or cylinder (or other circular feature) with a diameter dimension.
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Describe an arc with a radius dimension.
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When dimensioning holes, provide the X and Y values of the center of the hole referenced from the datum features identified in the designer’s input and specify the diameter and depth of the hole.
Note: If the hole passes all the way through the part (referred to as a “through hole”) it is not necessary to specify a depth.
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Dimension cylinders and other outside diameters in their profile (side) view and include the diameter symbol.
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Include all notes required to manufacture the part (material, scale, etc.).
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Use a single-stroke gothic (sans serif) text style for dimensions and notes. Minimum dimension text height should be .12 inches (3mm). All text should be fully legible when plotted or printed.
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When dimension values are in decimal inches, place decimal points in line with the bottom of the dimension text.
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When dimension values are in millimeters, a zero precedes dimensions less than one millimeter in size.
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Features should be dimensioned only once. Include dimensions not included in the designer’s input without first consulting with the designer.
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Dimension to hidden lines or hidden features such as the centers of hidden holes.
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Cross dimension lines, or leaders, with extension lines (break the extension line).
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Run leaders through dimension lines.
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Place dimensions on the object whenever possible.
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On drawings created with decimal inches, place a zero before the decimal point for a dimension with a value of less than one inch.
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When dimension values are in millimeters, place a decimal point, or a zero, after a dimension that is a whole number.
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