What is defined as a measurement from the surface to the bottom of a feature in machining?

The term that describes the measurement from the surface to the bottom of a feature in machining is depth. This measurement is crucial in various machining processes because it indicates how far down a feature extends from the outer surface. For instance, when creating holes or pockets, depth gives a clear understanding of how deep the cut should be made to achieve the intended design.

In machining, understanding the concept of depth helps in accurately programming the machinery and ensuring that parts fit together as intended. Depth also plays a significant role in determining other critical aspects such as the strength and durability of the machined part, as certain designs may require specific depth measurements to optimize performance or material usage.

The other terms—height, width, and radius—refer to different aspects of a geometric feature. Height generally measures how tall an object is, width measures the extent of the object on a horizontal plane, and radius relates to the distance from the center of a circle or arc to its edge. Thus, depth is the correct term for the measurement from the surface to the bottom of a feature in machining.