These casters come in 12 twin-wheel models, made for a number of applications including medical equipment, hospital beds and stretchers, appliances, furniture and retail displays. All casters in a set can be locked simultaneously, using a fully-enclosed, positive mechanical brake and locking system. The casters are made out of lightweight, pressure-diecast aluminum shells, with standard gray polyurethane and gray rubber wheels. They are made to reduce swiveling and pushing effort, using roller bearing and twin-wheel design for low rolling resistance and smooth tracking. With the total lock mechanical brake in the "off" position, the wheels swivel and rotate freely, and swiveling and rotation are prevented in the "on" position. Load capacities range from 198 to 330 lbs. Available overall wheel heights are 138 mm for 5-inch wheel diameters, and 164 mm for 6-inch wheel diameters. The swivel radii are 106 mm for 5-inch casters and 131 mm for 6-inch casters.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
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.