A gyratory crusher main shaft assembly has a main shaft, an axially upper region of the main shaft including a tapered conical section with a protective sleeve friction fitted over the cone. To facilitate mounting and dismounting of the sleeve, at least one groove is indented within a radially external facing surface of the main shaft at the region of the cone to allow fluid to be introduced under pressure to the region between the sleeve and the cone.

A gyratory crusher topshell having an annular shell wall that is strengthened to minimize stress concentrations and increase the topshell operational lifetime. The topshell includes spider arms that are structurally reinforced at their radially inner regions and also has an annular wall that is reinforced at regions immediately below the spider arms to further increase strength and facilitate casting.

A gyratory crusher bottomshell and inspection hatch assembly is attachable exclusively to the bottomshell via a wear plate positioned at an internal region of the bottomshell. A wall thickness of the bottomshell at a border region immediately surrounding the hatch opening is generally equal to or less than a wall thickness over a remainder region of the wall at the same axial height position of the hatch opening.

A dust seal for a cone crusher or gyratory crusher and a cone crusher or gyratory crusher are provided, wherein the crusher includes a stationary part having a dust collar, and a crusher head which is supported so as to be rotatable relative to the stationary part in a crushing direction of rotation and in an idling direction of rotation which is opposite to the crushing direction of rotation. The dust seal has a crusher head contact portion configured for directly or indirectly contacting the crusher head, and a dust collar contact portion configured for directly or indirectly contacting the dust collar crusher head. The dust seal is configured to impart a frictional force between the crusher head and the dust seal via the crusher head contact portion, and/or between the dust collar and the dust seal via the dust collar contact portion upon rotation of the crusher head at least in the idling direction of rotation. The invention is characterized in that the dust seal is configured so that the frictional force imparted by the dust collar contact portion and/or the crusher head contact portion is higher upon rotation of the crusher head in the idling direction of rotation than upon rotation of the crusher head in the crushing direction of rotation.

A dust seal for a cone crusher or gyratory crusher and a cone crusher or gyratory crusher are provided, wherein the crusher includes a stationary part having a dust collar, and a crusher head which is supported so as to be rotatable relative to the stationary part in a crushing direction of rotation and in an idling direction of rotation which is opposite to the crushing direction of rotation. The dust seal has a crusher head contact portion configured for directly or indirectly contacting the crusher head, and a dust collar contact portion configured for directly or indirectly contacting the dust collar crusher head. The dust seal is configured to impart a frictional force between the crusher head and the dust seal via the crusher head contact portion, and/or between the dust collar and the dust seal via the dust collar contact portion upon rotation of the crusher head at least in the idling direction of rotation. The invention is characterized in that the dust seal is configured so that the frictional force imparted by the dust collar contact portion and/or the crusher head contact portion is higher upon rotation of the crusher head in the idling direction of rotation than upon rotation of the crusher head in the crushing direction of rotation.

A gyratory crusher spider arm shield for releasable mounting to a spider arm is mounted in a position above and around the spider arm via locating feet and is maintained in the position by a fixating ring extending circumferentially around the spider arms and positioned at and above a perimeter of the spider.

A gyratory crusher spider arm shield for releasable mounting to a spider arm is mounted in a position above and around the spider arm via locating feet and is maintained in the position by a fixating ring extending circumferentially around the spider arms and positioned at and above a perimeter of the spider.

Embodiments disclosed herein provide a cone crusher having a mantle and a rotating eccentric that causes the mantle to gyrate from side to side with respect to a stationary frame to which is mounted a crusher lining. The cone crusher may include a thrust bearing having a first bearing ring rotating with the eccentric and a second bearing ring mounted to the frame, the first and second bearing rings being disposed immediately adjacent and facing each other, one of the rings having a plurality of spaced oil feeds and a first and a second set of ramps on a surface facing the other ring. The first and second set of ramps extend upwardly from each of the oil feeds in opposite circumferential directions.

Embodiments disclosed herein provide a cone crusher having a mantle and a rotating eccentric that causes the mantle to gyrate from side to side with respect to a stationary frame to which is mounted a crusher lining. The cone crusher may include a thrust bearing having a first bearing ring rotating with the eccentric and a second bearing ring mounted to the frame, the first and second bearing rings being disposed immediately adjacent and facing each other, one of the rings having a plurality of spaced oil feeds and a first and a second set of ramps on a surface facing the other ring. The first and second set of ramps extend upwardly from each of the oil feeds in opposite circumferential directions.

A cone crusher may include a crushing cone held on a driven eccentric bushing. The eccentric bushing may rotate in a radial direction about a spindle. The spindle may be fixedly clamped in a spindle receptacle provided in a housing lower part. The spindle may comprise a cylindrical upper bearing portion that is braced in a bore that forms the spindle receptacle by way of an upper mechanical clamping device.