The correct spelling of the term "surface gauge" is [ˈsɜː.fɪs geɪdʒ], with the emphasis on the first syllable. The word "surface" is pronounced with the vowel sound /ɜː/, which is similar to the sound in "bird" or "fern". The second word "gauge" is pronounced with the diphthong /eɪ/, which sounds like "ay". A surface gauge is a tool used in metalworking and woodworking to measure the height and alignment of a surface or edge.
A surface gauge is a measurement tool commonly used in machining and metalworking industries to accurately measure and mark surfaces in relation to a reference point or plane. It typically consists of a cylindrical base with a flat bottom, known as a foot, which provides stability and acts as a reference surface. The base is usually made of hardened steel to ensure durability and accuracy.
At one end of the base, a vertical column is attached, which can slide up and down to adjust the height of the gauge. The column often has a fine adjustment feature to allow for precise positioning of the measuring head. The measuring head, which is positioned at the top of the column, includes a spindle and a contact point that can move in various directions.
To use a surface gauge, the foot is placed on the reference surface, and the contact point is carefully adjusted to touch the surface being measured. The height of the contact point can be adjusted using the sliding column, and it can also be moved laterally or rotated to mark specific points or lines on the surface.
Surface gauges are primarily used for layout and inspection operations. They provide a reliable and accurate means of measuring and marking surfaces, ensuring precise machining and assembly processes. These gauges are essential tools in industries where precision and accuracy are critical, such as metalworking, machining, and quality control.
The word "surface gauge" combines the terms "surface" and "gauge". "Surface" originates from the Latin word "superficies", which means "superficial, exterior, or surface". "Gauge" derives from the Old North French word "gauge" or "gauger", meaning "a measuring rod or standard". It also traces back to the Old Norse word "geggr", meaning "a straight line". Hence, the etymology of "surface gauge" suggests a tool used for measuring or marking a specific point on a surface or a workpiece.