Wire and sheet metal gauges

TABLE 5.1 Wire and Sheet-Metal Gauges (Diameters and thickness values are in decimals of an inch)... 

Expansion joints bellows may be described in terms of gauge of metal, being that they are usually very thin. This term is not unconunon in welding and general plant repair work. For the reader s reference. Table 5.1 lists wire and sheet metal gauges. The Birmingham wire gauge (B.W.G.) is very common for tubes. 

Gauge gaj [ME gauge, fr. ONE] (15c) (gage) n. (1) Any instrument that measures and indicates such quantities as thickness, pressure, temperature, or liquid level. (2) The thickness of a plastic sheet or film, usually given in mils or mm. (3) Any of the standard wire and sheet-metal scales in which the gauge numbers are inversely related to wire diameter or sheet thickness. (4) The number of wales per inch in a knit fabric. (5) On spinning or twisting frames, the distance from the center of... 

Rolling mills produce two of the more important forms in which steel is sold— rods and sheets. Rods are the source materials for steel wire, construction materials (i.e., rebar and beams), steel coils, and so on. Automobile manufacturers require large shipments of steel sheets wound in large rolls. The rolling mills process hot metal to make these products, which can lead to oxidation of the metal. Ingots of the metal are sent through successively narrower rollers until the desired thickness (or gauge) of the metal is achieved. Successive rollers will produce rods of various shapes and diameters, or sheets that vary from plate thicknesses to thin foils. 

Layout the left side wire covers oh a sheet of 20 gauge sheet metal as shown in figure 58 59. Cut out the form for each cover and make the bends as shown in the perspective drawings. Mount tliem to the left side frame using the existing frame bolts as shown in figiire 62 and 63. 

The thickness of metal sheet is identified by a series of numbers blown as standard wire gauge, or SWG. Table 4.1 lists the most frequently used gauges and gives their thickness in millimetres. 

The electrolysis apparatus shown here consists of a —15 X 15-cm sheet of aluminum foil taped to a wooden surface. On the metal is taped (at one edge only) a sandwich consisting of filter paper, printer paper, and another sheet of filter paper. A stylus is prepared from copper wire (18 gauge or thicker) looped at the end and passed through a length of glass tubing. 

---