The division of concrete crusher is mainly based on the width of feeding ports. If the feeding port width is below 300mm, it is a mini concrete crusher; if the width of feed inlet is 300600, it is a mediumsized concrete crusher; more than 600 (including 600) is a largesized concrete crusher. Features of Concrete Crusher. 1. Its crushing cavity is deep without dead zone, which improves the feeding ability and yield .