Subscriber & Member Login

Jump ring sizes Metric/English Conversions


The inside diameter of a jump ring is measured by the size of the mandrel used to make it. Some jump-ring manufacturers use mandrels that are measured in fractional inches (like 1/8 in.), while others use mandrels measured in millimeters, which come in quarter-millimeter increments. When choosing jump rings to make a project, this can be confusing. If a project calls for jump rings measured in millimeters, and the store you shop at sells jump rings measured in inches, you may find that there are no rings that perfectly match a straight math conversion (1 in. = 25.5 mm).

 

In this chart, the first figure is the one that the project calls for, if the author used jump rings measured in inches. The number in parentheses following that figure is the exact mathematical conversion to millimeters. The number in the second column is the closest commercially available size in millimeters.

Art-Jewelry-Chart01




In this chart, the first figure is the one that the project calls for, if the author used jump rings measured in millimeters. The number in parenthesis following that figure is the exact mathematical conversion to inches. The first number in the second column is the closest commercially available size in fractional inches, followed (in parentheses) by the mathematical equivalent in decimal inches.

Art-Jewelry-Chart02




An * indicates instances where the closest commercially available size in the conversion is smaller than the rings as called for in the project. In extremely size-sensitive weaves, you may run into space constraints. If the design is snug to begin with, you may want to go up in size to the next commercially available ring.

0

Join the discussion

Read and share your comments on this article

Comments

Want to leave a comment?
Only registered members of ArtJewelryMag.com are allowed to comment on this article. Registration is FREE and only takes a couple minutes.

Login or Register now.
0 comments
Follow Us
Follow Art Jewelry on PinterestFollow Art Jewelry on FacebookFollow Art Jewelry on Twitter

Marketplace

Buy this Issue

ART160301
Art Jewelry's mission is to teach the beginning jewelry maker, broaden the skills of those at the intermediate level, challenge the advanced artisan - and inspire them all.

Shop

ajpdf140138

Bell Charm

With a few basic forming, soldering and finishing techniques, you'll be able to make jewelry with bells.

Loading...