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This crusher is a modification of the standard machine, developed for fine-crushing duty. Mechanically, the machine is the same in every respect as the standard crusher of the same type, but for each developed size of machine a special top shell and concave ring has been designed, with reduced receiving opening, reduced angularity between head and concave, ring has been designed, with reduce receiving opening, reduced angularity between head and concave, and, consequently, superior characteristic at the finer settings. Medium crushing chambers may be operated at close-side settings of one-half the eccentric-throw, on screened feed, hence capacities at the finer settings are better than those of the standard type. Fine crushing chambers operate at one-fourth the eccentric throw. Inasmuch as the maximum feed-size is smaller in the case of the fine chamber, the ratios of reduction are approximately the same for both machines. |
