The standard material for spiral-wound retaining rings is carbon spring steel. Some rings are available in other materials such as 302, 316, and 17-7 PH/C stainless steel, NS A286 alloy, beryllium ...

In steel or exotic alloys, the rings sport oil dip, black oxide, cadmium plating, passivation, or zinc phosphate finishes. For more information, contact Joe Cappello at (732) 469-7333 or visit ...

Distinctive spiral patterns carved into a small jade ring show that China was using complex machines more than 2500 years ago, says a Harvard graduate student in physics. The spiral-patterned ring ...