What does a thick, solid line with arrows signify on a technical drawing?

A thick, solid line with arrows on a technical drawing signifies dimension lines indicating measurements. These lines are essential for conveying the size and scale of the components being represented. They typically indicate the direction and extent of a dimension, and the arrows at each end of the line point to the specific locations that are being measured.

This type of line is crucial for effective communication in technical drawings, as it helps machinists and engineers understand the exact specifications needed for making parts accurately. Clearly defined dimension lines ensure that parts are manufactured to the precise dimensions required for assembly and function.

While hidden details, cutting methods, and material specifications have their respective representations on technical drawings, they utilize different types of lines or annotations that are distinct from the thick, solid lines with arrows used for dimensioning.