Gyratory crusher topshell

A gyratory crusher topshell comprising:

• an annular shell wall extending around a longitudinal axis, the wall having a radially outward facing surface, a radially inward facing surface, an axial upper annular end and an axial lower annular end for mating with a bottomshell;
• a plurality of crushing shell mount bores extending axially through the wall towards the lower annular end to receive clamp bolts to mount a crusher shell within the topshell, wherein a radial thickness of the wall at reinforced regions extending in the circumferential direction between and at an axial position of an axial upper end of the mount bores is greater than a radial thickness of the annular wall at a position of each mount bore in the circumferential direction;
• and
• a spider having arms extending radially outward from a boss positioned at the longitudinal axis extending through the topshell, to the axial upper annular end of the wall, wherein the mount bores are distributed in a circumferential direction around the wall and being positioned at regions not axially below a central region in the circumferential direction of a radially outer end of each of the spider arms, wherein a width of each of the spider arms in a plane perpendicular to the longitudinal axis and in a radially inward direction increases at respective transition regions of connection with the hub, wherein a shape of the transition regions in the plane perpendicular to the longitudinal axis is a linear taper or is convex and the transition regions terminate at an outward facing surface of the hub.