We offer two types of forced feed and yet small jaw crushers: The Type “H” has cast steel or alloy iron frame, steel bumper with over-size roller eccentric bearings, bronze side bearings and manganese steel jaw and cheek plates. The Type “J” is made in two styles, one with bronze bearings and the other with anti-friction … Read more
No discussion of primary crusher selection would be complete without a comparison of the two leading types: the standard gyratory crusher and the Blake jaw crusher. Although their fields of application overlap to a considerable degree (at least in the realm of primary crushing) there is no real conflict between these two machines; one supplements the … Read more
History tells us, it was in 1830, the first US patent was issued on a rock crushing machine. It covered a device which, in a crude way, incorporated the drop hammer principle later used in the famous stamp mill, whose history is so intimately linked with that of the golden age of mining. In 1840, another patent was … Read more