Gauge (engineering)
Overview
Engineering
Engineering is the discipline, art, skill and profession of acquiring and applying scientific, mathematical, economic, social, and practical knowledge, in order to design and build structures, machines, devices, systems, materials and processes that safely realize improvements to the lives of...
, a gauge or gage, is used to make measurement
Measurement
Measurement is the process or the result of determining the ratio of a physical quantity, such as a length, time, temperature etc., to a unit of measurement, such as the metre, second or degree Celsius...
s. A wide variety of tools exist which serve such funtions, ranging from simple pieces of material against which sizes can be measured to complex pieces of machinery. Various types of gauges include:
- A bore gaugeBore gaugeA bore gauge is a convenient term for the measuring or transfer tools that are used in the process of accurately measuring holes.-Telescopic gauges:...
, a device used for measuring holes. - A caliperCaliperA caliper is a device used to measure the distance between two opposing sides of an object. A caliper can be as simple as a compass with inward or outward-facing points...
, a device used to measure the distance between two opposing sides of an object. - Center gauges and fishtail gauges are engineering gauges used in latheLathe (metal)A metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to machine metals; however, with the advent of plastics and other materials, and with their inherent versatility, they are used in a wide range of...
work for checking the angles when grinding the profiles of single-point screw-cutting tool bitTool bitThe term tool bit generally refers to a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool. The cutting edge is ground to suit a particular machining operation and may be resharpened or...
s and centersLathe centerA lathe center, often shortened to center, is a tool that has been ground to a point as to accurately position a workpiece about an axis...
. - A dial indicatorDial indicatorDial indicators, also known as dial gauges and probe indicators, are instruments used to accurately measure small linear distances, and are frequently used in industrial and mechanical processes...
, also known as a dial test indicator, dial gauge, or probe indicator, is an instrument used to accurately measure small linear distances. - A feeler gaugeFeeler gaugeA feeler gauge is a tool used to measure gap widths. Feeler gauges are mostly used in engineering to measure the clearance between two parts.They consist of a number of small lengths of steel of different thicknesses with measurements marked on each piece...
is a simple tool used to measure gap widths. - A gauge block, (also known as a gage block, Johansson gauge, slip gauge, or Jo block) is a precision ground and lappedLappingLapping is a machining operation, in which two surfaces are rubbed together with an abrasive between them, by hand movement or by way of a machine.This can take two forms...
length measuring standard.
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