jaw crushers are an excellent primary crusher when used to prepare rock for subsequent processing stages. cone and gyratory crusher. these are also compression-type machines that crush material between a moving and a stationary piece of steel. the setting between the two pieces controls the output.,stone crushing equipment and hipro series primary,cpc equipments private limited is the heavy machinery manufacturing arm of the cpc group of companies. since 1990 we have been involved in the manufacturing of crushing, screening and conveying equipment for the mineral processing industry.