How is a "position tolerance" indicated for holes?

• A. With a dashed line and numerical value
• B. With a characteristic symbol and tolerance value
• C. By measuring the diameter of the hole
• D. Through a color-coded system

Answer: (B)

A position tolerance for holes is indicated using a characteristic symbol along with a tolerance value. This method provides a clear and standardized way to convey the acceptable range of location for the holes in relation to the specified datums. The characteristic symbol for position is a square with a circle, which helps identify that the feature has specific positional requirements.

Furthermore, this type of tolerance ensures that the axis of the hole is positioned accurately within the defined tolerance zone, which is often a cylindrical space around the nominal position of the hole. By incorporating both the symbol and the numerical tolerance value, designers and manufacturers can maintain precise control over the location of holes, facilitating better assembly and function in the final product. This approach is integral to achieving desired performance characteristics in mechanical components.