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Progress in Roll Crushing. BY C. Q. Payne, New York, N. Y. On the right, a Roll Crushers is shown in a sectional elevation of the A C single roll crusher while here below is a cutaway view of the machine, with hopper and part of the near side frame removed to show the crushing chamber. The moving elements of the machine consist of the roll, with its supporting shaft and driving gear, and the.Hammer crusher, also known as hammer mill crusher, is composed of rotor, hammer, lining plate, sieving plate, etc. It is widely used to process the brittle materials and the minerals with medium and hard hardness, such as limestone, granite, gypsum, granite and other materials in mining, quarry, construction, chemical and other industries.