SANTAPER STICK BLUE 240 GRIT
Provide a fast, easy, economical way to reach detailed, hard-to-reach areas. Plastic stick, tapered at the end, holds a replaceable 1/4″ (6 mm) wide sanding belt. The aluminum oxide belt is held in place by a patented spring-loaded mechanism that allows the belt to be rotated 360 degrees. Rotating the belt exposes a new sanding surface and allows the entire belt to be used.
Q: Some vendors sell jump rings by the outside dimension (OD) and some sell by the inside dimension (ID). If I’ve bought rings by the OD but need an ID measurement, what’s the easiest way to measure?
A: The most precise way to measure the inside of a jump ring is with digital calipers. It’s not a tool everyone has lying around, I know! But I find them indispensable, not only for measuring jump rings but for the precise measuring of bead sizes. They’re not terribly expensive. Brass calipers will work, too, I just find the digital ones easier to use.
Q: I ran across the term “aspect ratio” (AR) recently when reading about jump rings for chain maille. What does it mean?
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. The exact formula to calculate aspect ratio is the inner diameter divided by wire diameter (WD), or in shorthand: AR = ID ÷ WD. Before using the formula, make sure to convert the wire gauge to millimeters or inches (to match the unit system used for the ring’s ID).”
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