PowerAc TMtrapezoidal screws from Nook Industries have centralizing threads that maintain alignment of the thread axis. The screws are manufactured in accordance with ISO standards. "We are finding more customers designing with global sales in mind, so they are asking for metrics," says Rick Christyson, chief engineer at Nook. The company offers eight sizes from 10 to 65 mm. The screws are accurate to within±0.1 mm per 300-mm lead. "The screw's threads are made with a 30ºangle. We make the nuts to match, so there is no wedging or binding. Keeping the tolerances tight also lowers the friction and extends the life of the products," says Christyson. Plastic and bronze nuts are matched with screw capacities. Customers choose trapezoidal screws made from stainless steel for food and medical applications or high-carbon 4140 alloy steel for machine tool, packaging, and other industrial applications. PowerAc screws are compatible with the company's EZZE-MOUNT™bearing supports for 16-, 20-, 26-, 40-, 55-, and 65-mm universal face/foot-mount bearing supports and 16-, 20-, 26-, 40-, and 55-mm flange-mount bearing supports.
A middle school team from Rochester, Mich., has again nabbed the grand prize in the annual international Future City Competition, which drew students from 37 regions of the United States, as well as from England and China.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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.