Avoid dimensioning to hidden lines.

More Questions from Dimensioning

• Most mechanical drawings will include tolerance information in or near the drawing title block.
• Typically, all dimension values and notes are lettered horizontally and should read from the bottom of the sheet.
• A set of two mutually perpendicular datum planes is required for coordinate dimensioning.
• When a finished part is measured, it may vary slightly from the exact dimension specified.
• The American Society of Mechanical Engineers provides a set of common standards used by industry for placement of dimensions.
• Fillet radii can be given in a general note.
• It is permissible to letter a dimension value over any line on the drawing.
• Although an engineer has placed dimensions in specific locations the drafter has the freedom to arrange them as he deems necessary.
• In a group of parallel dimension lines, the dimension values should be staggered.
• By adding dimensions to a technical drawing the drafter is providing information about the size and location of features of a part.

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