What does NCD stand for?

What does NCD stand for?

• A. Bolt circle Diameter
• B. Nominal Circle Diameter
• C. Bolt Circle Distance
• D. Neck Circumference Diameter

Answer: (A)

NCD stands for Nominal Circle Diameter. This term is used to describe the reference diameter of the circle on which bolt holes or features are arranged, serving as a nominal guide for locating the holes rather than a precise, exact measurement. In practice, the bolt holes are placed along a circle, and the diameter of that hole pattern is the bolt circle diameter, but the conventional name for the dimension used to describe that pattern is Nominal Circle Diameter. Knowing this helps you read drawings and specs correctly, since NCD emphasizes the intended, standard reference size rather than a strict measured value.

NCD stands for Nominal Circle Diameter. This term is used to describe the reference diameter of the circle on which bolt holes or features are arranged, serving as a nominal guide for locating the holes rather than a precise, exact measurement. In practice, the bolt holes are placed along a circle, and the diameter of that hole pattern is the bolt circle diameter, but the conventional name for the dimension used to describe that pattern is Nominal Circle Diameter. Knowing this helps you read drawings and specs correctly, since NCD emphasizes the intended, standard reference size rather than a strict measured value.