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double roll crusher and roller gear tooth layout design

lower quality gears. Note that the involute profile does not prevent the teeth from scraping each other every time they mesh, and this is the dominant source of wear. It is not possible to design a gear tooth profile which rolls through the mesh without friction. The figure N 1 show the involute curve generation with the most important elements.Double-duty sprockets incorporate an extra row of teeth between the chains pins, so once one set of sprocket teeth are worn, the drive can be adjusted to run on the second, unused set of teeth. This sprockets pitch is half that of the corresponding chain. The sprocket to the right never had its chain repositioned. Image Credit Heavy Equipment Forums

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