The correct spelling of the tool used for marking or measuring surfaces is "surface gage." It is pronounced /ˈsɜːr.fɪs ɡeɪdʒ/, with the first syllable "sur" pronounced like "ser" and the second syllable "face" pronounced as "fir" with a silent "e." The word "gage" is spelled with a "g" instead of a "gu," and is pronounced like "gauge." The IPA phonetic transcription helps to explain the pronunciation and spelling of the word "surface gage."
A surface gage is a precision tool commonly used in metalworking and machining applications to measure and mark surfaces accurately. It typically consists of a flat and sturdy base with a vertical rod or stem attached to it. The base may be made of cast iron or steel, ensuring stability and durability.
The vertical rod is equipped with a fine adjustment screw that enables precise positioning and alignment of the measuring point. At the top of the rod, there is a scriber or a small pin-like device used to mark the surface being measured. The scriber can be adjusted vertically or tilted at different angles, allowing for versatile marking applications.
Surface gages are primarily utilized for layout work, such as scribing lines, circles, or arcs on metal surfaces. They are particularly useful in creating parallel lines, testing flatness, and inspecting machined surfaces for accuracy. By resting the base on a stable surface and adjusting the scriber to the desired position, the user can trace or scratch lines with minimal error.
Due to their precision and versatility, surface gages find extensive use in various industries, including manufacturing, engineering, and carpentry. Furthermore, they are often used in conjunction with other measuring tools like micrometers, height gauges, or surface plates for more in-depth dimensional analysis and quality control.
The word "surface gage" is derived from two components: "surface" and "gage" (also spelled as "gauge").
1. Surface: The word "surface" originates from the Middle English word "surfas" which came from the Old French word "sur face", meaning "the exterior, outermost part" or "superficial". It can be further traced back to the Latin word "superficies", meaning "an upper face". Over time, the word "surface" has come to refer to the outermost layer or topmost part of an object or a physical boundary.
2. Gage/Gauge: The term "gage" or "gauge" has a rich etymological history. It is derived from the Old North French word "gage", which meant a "pledge" or "surety".