The size of the jaw crusher is indicated by the width of the feed port × length = B × L. For example 250 × 400 mm Jaw crusher , which means the feed port width = 250 mm , length L= 400 mm .

The jaw crusher feed width determines the maximum size of the ore. Generally, the maximum agglomeration degree ( D ) is 75% -85% of the width ( B ) of the crusher feeding port, that is, D= ( 0.75 ～ 0.85 ) B. Usually, the compound pendulum can be taken to 85% of the width of the mine mouth. It can be taken to 75% of the width of the mine.

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