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History of the Screw

Screws in Greek and Egyptian Times
A complete history of the screw is not known. There is historical evidence that by the first century it was used in a screw press. Screw presses used by the Romans to squeeze olives for oil and grapes for wine have been found.  Archytas of Tarrentum is credited by the Greeks with the invention of the first screw.  But the Greek philosopher Archimedes is also credited with inventing the screw around 234 BC.…

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Industry 4.0: Get ready now

Manufacturers are on the brink of a major leap in productioncalled Industry 4.0.  It describes the current generation of workflow processes infusing smart technology, big data and brainpower. According to the National Institute of Standards and Technology (NIST), “ [M]anufacturers that successfully implement the Industry 4.0 technologies best-suited for their businesses no longer need to choose between focusing on a better top line or a more profitable bottom line – as they can improve both at the same time.”
Industry 4.0 succeeds Industry 1.0,…

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How Plastics Wear Against Plastics

Wear of Plastics Against Plastics
Wear characteristics of one plastic against another vary widely, even among those materials with good natural lubricity. When an application calls for plastic-to-plastic bearings, shafts, gears and other parts, the combination must be chosen carefully.
Plastics and the Laws of Nature
Because plastics are not rigid bodies, they do not behave according the natural laws of friction.   It is these deviations which cause some of the unexpected results when plastics are run against metal. …

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