Tolerances of form and position are typically not used to control straightness.

More Questions from Tolerancing

• Defining the datum reference frame is necessary to apply GDT principles.
• Datum surfaces and features are used as references to control other features.
• Geometric dimensioning and tolerancing can simplify the inspection process.
• Specific tolerances are based on the part's function and fit.
• Tolerance is the total amount a specific dimension is permitted to vary.
• Increased precision makes parts less expensive to manufacture.
• The ISO has its own system of preferred metric limits and fits.
• Geometric tolerances state the maximum allowable variations of a form or its position from the perfect geometry implied in the drawing.
• In reference to geometric tolerancing, the term "geometric" refers to forms such as planes, cylinders, and squares.
• Large batches of parts may use statistical methods to control quality where a sample of parts is inspected.

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