If they do not list ARs, you will have to see which Mandrel AR gives you an AR that is closest, but on the slightly-smaller side - because remember the ring's actual AR will be bigger than the mandrel AR. If they do, you're in luck and hopefully can find what you need. If you don't have rings and you need to purchase them from a supplier, you should check to see if the supplier lists the actual ARs for their rings. In order to duplicate the weave, you would need to find rings of a smaller gauge with the same (or very close) actual AR. You measure your rings with calipers to determine the AR. Let's say you make a weave and you LOVE the way it looks and you want to duplicate it, only smaller. Micromaille rings are often pinch-cut for this very reason - to avoid removing so much of the metal that the ring is no longer decently circular. Before using the formula, make sure to convert the. The exact formula to calculate aspect ratio is the inner diameter divided by wire diameter (WD), or in shorthand: AR ID WD. However, this also results in an oval-shaped ring that is not useful for most chainmaille weaves. A: According to Blue Buddha, 'Aspect ratio is a number that represents the relationship between the wire gauge and the inner diameter of a particular size jump ring. **Disclaimer: There is a rare exception to this - if your rings are very tiny and you use a thick saw to cut them, the resulting ring could have so much metal removed by the saw, proportionate to its size, that the ending inner diameter is actually smaller than the mandrel size. 1.37:1 was the ratio officially approved by. Film strips eventually became 1.37:1, and that became the standard for cinema across the globe. As film evolved, so did the aspect ratio. The 4:3, or 1.33:1, was the literal measurement of the strip. It can calculate the aspect ratio based on the ring's diameter or. The standard film strip was run through a projector and light behind it through the image onto a wall. This makes the inner diameter of the jump ring larger than the mandrel itself, thereby making the Actual AR higher than the Mandrel AR Chainmail Ring Aspect Ratio Calculator is a handy and reliable program designed to assist in calculations for chainmail jewelry. *After wire is coiled it always "springs back" slightly from the mandrel once the tension on the coil is released. However, the Mandrel AR for those 1/8" rings will be the same, since the Mandrel calculations do not take any of those variables into account. The same size may also differ across metals within a single supplier for many reasons, some of which include: temper of wire and size of the cut (kerf). Generally speaking, one supplier’s Actual inner diameter of 1/8" (aka D, aka 3.2 mm) does not equal another suppliers. NOTE: The ARs listed on the upper right of Blue Buddha's packaging and on the online stats pages ( base metal and sterling silver) are Actual ARs. These numbers are different because springback* causes the inner diameter of jump rings to be larger than the mandrel they are wrapped around.** For instance, Blue Buddha's D18 ALUM ring has a measured AR of 2.9 but its mandrel AR is 2.67 This is a variance of 8.7% Mandrel Aspect Ratio, on the other hand, is calculated simply by using the mandrel size the jump ring was wrapped around as the Inner Diameter number. It has been measured with calipers or micrometers. Measured Aspect Ratio, also known as Actual AR, is the exact aspect ratio of a jump ring. How does Measured (actual) AR differ from Mandrel AR?
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