Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . The earliest crushers were hand-held stones, where the weight of the stone provided a boost to muscle power, used against a stone anvil. . powers by having been leading producers brass and bronze guns, and eventually by.manufacturers of manual rock crushers,Keep on Crushing - Aggregates ManagerJul 5, 2011 . Rock crushers have, essentially, three types of maintenance needs: . Just remember the maintenance manual from the manufacturer should.HSE - Quarries - Safe operation and use of mobile jaw crushersOct 11, 2012 . Guidance on the safe operation and use of mobile jaw crushers. . and falling; Manual handling of rocks and equipment; Unexpected movement of crusher . with manufacturers/suppliers instructions) and safety harness worn.
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