You can think of ID as the hole in a donut, and WD as the thickness of the donut itself. So what is AR? Mathematically speaking, it is the ratio of the inner diameter of a ring to the diameter of the wire it is made of. If you know the AR of the rings you have, you can find out what weave you can make with them. If you know the right AR for a weave, you can determine an appropriate ring size. This value, something of a magic number, serves as the mediator between weave and ring size. Society for Creative Anachronisms (SCA)Ī common question when learning a new weave is "What size ring should I use for this?" The best way to find an answer is to understand the concept of aspect ratio.Be sure to pay attention between A.W.G and British S.W.G as the values are different. Note: You cannot calculate AR using gauge values, especially since there is no one wire measurement standard. Aspect Ratio numbers are not law, some artists prefer a tight weave while others prefer a loose weave and create the A.R. Find a 20ga jump ring with a I.D of 2.6 or greater. Convert your prefered wire gauge into decimal millimeters.Įxample: AR (3.2) x gauge (0.8) = 2.6mm Inside Diameterģ. If you make the chain and you feel it is too heavy, reduce the gauge.ġ. But I am just as willing to try 4.5mm ID if I think the results will give me a superior outcome. There is some leeway, generally I round up to the nearest quarter or half millimeter and try a 4.25mm ID. NOTE: Just because you get 4.2 mm ID, don't worry when we don't have that size. Multiply the A.R value as reported in your instructions and mulitply it by the decimal gauge thicknessĮxample: AR (3.2) x gauge (1.3) = 4.2mm Inside Diameter Tons of charts out there, here is a link to one of wikipedia - AWG SWGĢ. Convert your prefered wire gauge into decimal millimeters. in a set of instruction that reads 3.2 A.R.ġ. How to manually calculate the correct jump ring size using A.R. For those who have a thirst for knowledge, continue down to calculating Aspect Ratio. Here is a quick chart for alternative sizes in jump rings. The most popular request for aspect ratio is the Byzantine Chain (A.R. This allows the next artist to build a lighter version using thinner gauge jump rings or a bolder version using thicker gauge jump rings and still maintain the structure of the chain. allowing for the chain to be constructed using different size jump rings. Instead of stating that the chain works in 16ga 4.5, they notate the A.R. jump ring sizes until they get, what they consider the perfect chain. They take their favorite chain and attempt to make it in different I.D. Aspect Ratio is sometimes shared by chain maille artists. Aspect Ratio is the Ratio (value) between a jump rings wire thickness or gauge (GA) and its Inside Diameter (I.D). We get frequent emails from customers looking to make a chain from our site using jump rings larger or smaller than those in the instructions.
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