Making tapered threads in brass, aluminum, or other difficult-to-roll materials is challenging. Attachment "walking" or "screw jacking" during cold forming result in flaking, slivering, and poor thread finish.
The match taper uses skewed rolls so that the large diameter of the thread roll works the large diameter of the workpiece, and the small diameter of the thread roll works the small diameter of the workpiece. Match taper more accurately tracks the roll on the part to reduce roll slippage and thread-roll wear.
C.J. Winter Machine Works Inc., (A), 130 Albert St., Rochester, NY 14606-5594; (800) 288-7655 Ext. 500.
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.
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