In cone crusher reliability,the largest progress has been seen in the application of hydraulics to protect crushers from damage from uncrushable objects entering the crushing chamber.
Foreign objects, for instance steel, can cause extensive damage to a cone crusher, and more costs in lost production. The advance of hydraulic relief systems has greatly reduced downtime and improved the life of these machines
As regard to the most part advances in crusher design have moved slowly. Jaw crushers have remained virtually unchanged for sixty years.
More reliability and higher production have been added to basic cone crusher designs that have also remained largely unchanged. Increases in rotating speed, have provided the largest variation. For example, a 48 inch (120 cm) cone crusher manufactured in 1960 may be able to produce 170 tons/hr of crushed rock.However, the same size coneproduced today may manufactured 300 tons/hr. These production improvements come from speed increases and better crushing chamber designs.
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