When talking about thickness, something being for example 14 gauge, how thick is it?
Is there a conversion table to be had somewhere, for the different gauges, into millimetres or inches?

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Somewhere on line should be a chart or you can get a gauging wheel (like us sheet metal workers use). Gauge refers to the standard thickness of a wire, a 16 gauge wire should be as thick as a 16 gauge peice of metal...aluminum is not "gauged" is comes in standard decimal sizes like .125, .063, .040,.032,.025...


A quick and dirty reference would be something like:

11 gauge is .125 (10 is a bit thicker, 12 is a bit less...but they only make even gauged metal...but if the roll process is off you may get some 12 guage material that will test to 11...)

16 gauge is .063

24 gauge is about .025 ish (24-22 is body panel material, unless it's a 1964 Imperial then 20 is your buddy)

28-30 gauge is so thin I wouldn't use it in an automobile repair...

-D.Idiot

Used to have a chart like that hanging on my wall, back at my old job. Here's an online one:

http://www.unc.edu/~rowlett/units/scale ... metal.html

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Nuh-uh. The American Wire Gauge (AWG, formerly known as Brown & Sharpe Gauge/BSG) system for sizing electrical wire does not correspond to gauge sizes for plain or galvanised sheet steel or sheet aluminum (which is gauged, as it seems) or to gauge sizes for steel wire. See here for AWG conductor sizes, and compare to the sheetmetal gauge chart in the link supplied by Matt C.

Outside North America, the rest of the world measures wire in conductor cross-sectional area, in square millimetres. The conversion is included in the linked table, or here is a simpler, more user-friendly conversion chart between AWG and mm2 (this is a better chart because it uses the same rounding that is used in the marketing of actual wire. Nobody sells 2.62 mm2 wire, they sell 2.5 or 3.)

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Lots of tech info:

www.thelenchannel.com/1tech.php

If you want a desk reference, I recommend Machinery's Handbook. It has more math, metallurgy, machine design, and tech specs than you can shake a stick at. Get the Guide to go with it.

http://www.industrialpress.com/en/Machi ... fault.aspx

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

Dan, I said "a wire", I didn't say an electrical wire (funny how we all jump to conclusions in our own field of interest)...we sheet metal workers don't do electrical (unless you are that offshoot of the tradesman called an HVAC Service Technician), we do SWG (plus or minus tolerance for rolled stock....which is always out of tolerance because the USA imports it from China/Korea/etc...).


Gauging for non Ferrous metals is different (we don't even use a gauge on Copper sheet, we just refer to it's weight per square foot in ounces, and generally shops only carry 24 oz copper for architectural coverings, for example).


-D.Idiot


"What do you call an electrician who's Dart loses both back wheels going down the highway?"

"Sparky!"

Thanks everybody for the answers. I was referring to the sheetmetal thickness, so that was explaines in the first chart, thanks Matt.
It's a bit confusing when different types of metals have different thicknesses for the same gauge#. Does anybody now the history why it is so. Does it have anything to do with the weight per square inch?

_________________
Mopar or no car.

Bye the way, who the F**K is Tu Ning?

It's more an inverse relationship. The number of something that size to weigh some amount.

For example, in shotguns, twelve lead balls of the nominal bore size for a 12-guage weigh a pound. A 20-gauge is smaller, while a 10-guage has a larger bore.

The history has to do with what measuring tools and were available and what kind of manufacturing tolerances could be held way back when. One might not have a precise micrometer, but a scale was common. A factory might not be able to hold dimensions to +/- .01", but they could measure feet and pounds to check the average.

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO