Rethinking the Bridge
Bridges in the U. S. are not aging gracefully. To cut the cost of replacing many of those bridges, engineers at Advanced Infrastructure Technologies, Orono, Maine, have developed a hybrid concrete-composite bridge that also saves time and raw materials. Check out the full article here Rethinking the Bridge.
What's Inside Two Different Star Wars BB-8 Droids
The Hasbro BB-8 is controlled with an infrared remote control pad. Interestingly, the IR detector is inside the ball on the main drive unit. The signal from the controller gets to the detector through the dozens of holes around the balls surface. Check out the full article here What's Inside Two Different Star Wars BB-8 Droids?
A Bearing Built for Wind Turbines
Engineers at The Timken Co., North Canton, Ohio, have designed UltraWind bearings, a line of tapered roller bearings that range up to 9.6 ft in diameter. They are well suited for multi-megawatt turbines both onshore and offshore. Check out the full article here A Bearing Built for Wind Turbines.
A Small Motor Packs a Powerful Punch
Engineers at maxon precision motors inc., Fall River, Mass. (www.maxonmotorusa.com), EC4, is a 4-mm-diameter brushless-dc motor and gearhead. It uses the latest winding technology and the most-powerful magnets available to design a motor with 0.5 W of power. Check out the full article here A small motor packs a powerful punch.
Helical Gearboxes Handle Higher Torque with Less Noise
The new PE helical gearboxes from Stober Drives Inc., Maysville, Ky., handle more torque, generate less noise, and provide smoother motion than spur-gear units. The units come in four case sizes ranging from PE2 to PE5, and can have single or double stages with ratios from 3:1 to 100:1. Check out the full article here Helical Gearboxes Handle Higher Torque with Less Noise.
Wheel Uses Beam and Spokes Instead of Inflatable Tube
Engineers at Michelin headquartered in France, have designed and built a single unit, the Tweel. It needs no air pressure, so there’s no valve assembly, and the tire and wheel are combined in one component. The current skid-steer Tweel can carry 4,400 lb at 9.3 mph, and measures 12.1-in. wide with a 32.7-in. diameter. The contact area is 61.4 in2. Check out the full article here Wheel uses beam and spokes instead of inflatable tube.
Rolamite Linear Actuator Cuts Friction and Complexity
Engineers at NASA first developed the rolamite bearing as a way to get motion with less friction than possible with roller bearings and to eliminate cogging. Now available from Origin Corp., Treichlers, Pa. The payload can mount to the carriage, a gantry-type actuator, or the housing (for pick-and-place applications). Check out the full article here Rolamite Linear Actuator Cuts Friction and Complexity.
Magnets Replace Gas in Springs
Magna-Lift magnetic springs from Magna Motor Inc., Chippewa Falls, Wis., use magnets to supply the pushing or pulling forces. They operate in temperatures ranging from 200 to 430F, with no demagnification or loss of internal forces. Check out the full article here Magnets replace gas in springs.
Gear Series Expands with High-Torque Low-Backlash Units
Engineers at Stober Drives Inc., Maysville, Ky., have added two smaller sizes to the company’s line of Servo-Fit PHQ gear units. The PHQ gears feature a four-planet design that handles high torque levels with little backlash, good rigidity, and smooth operation. The gear units are said to be well suited for robotics, automation, food packaging, plastic injection molding, and tube bending. Check out the full article here Gear series expands with high-torque low-backlash units.