If the crusher is to be fed directly by a conveyor: All dangerous parts of machinery should be suitably guarded. Failure to replace guards (on crushers and conveyors) after cleaning or maintenance work is a major cause of injury on these machines. Fig. 2 Excavator feeding mobile stone crusher. Blocked crushers Causes
years. Production of the first mobile crushing and screening plant systems for processing rock and stone began way back in the 1920s. From the mid 1950s onwards, the company increasingly focused its efforts on the construction of stationary crushing and screening plants and in .