Rulon 1337 and 1439 materials are following the Saint-Gobain's Rulon 641 material, and designed to meet FDA compliant bearings regulations. The Rulon 1439 material holds up well in submerged applications, while the Rulon 1337 resists wear against lower hardness mating surfaces. The 1337, 1439, and 641 materials all work well with stainless steel and come in standard or custom sizes. They can withstand temperatures from -400 to 550F (-240 to 288C) in continuous operation. Their self-lubricating design needs no maintenance.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Noting that we now live in an era of “confusion and ill-conceived stuff,” Ammunition design studio founder Robert Brunner, speaking at Gigaom Roadmap, said that by adding connectivity to everything and its mother, we aren't necessarily doing ourselves any favors, with many ‘things’ just fine in their unconnected state.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.