Gyratory crusher having easily removable mantel stud

Abstract

A gyratory crusher for crushing material having a frame mechanism including a lower frame portion; a crusher head having a crushing surface; a mounting mechanism, including a main shaft having a distal end, for pivotally and gyrationally mounting the crusher head on the lower frame portion, wherein the distal end has a first partial bore with first threads; a mantel; and a securing arrangement for removably securing the mantel in covering relation to the crushing surface. The securing arrangement includes a mantel nut; a mantel stud connected to the distal end of the main shaft and configured to receive the mantel nut, wherein the mantel stud has second threads matable with the first threads and wherein the handedness of the first and second threads is configured to be operatively self-tightening during crushing operations, and third threads for threadably receiving the mantel nut; and an arrangement for preventing over-tightening of the mantel stud during crushing operations, including at least one second partial bore spaced across the first and second threads as the first and second threads are in mating engagement, and a dowel pin configured to be received by the at least one second partial bore as the first and second threads are in mating engagement.