Abstract: An exemplary center housing rotating assembly includes a turbine wheel; a compressor wheel; a center housing (510) that includes a through bore (515), extending from a compressor end to a turbine end along a bore axis; a bearing assembly (530) positioned in the bore where the bearing assembly includes an outer race (532) that includes keyways (535, 535?) extending from an axial end, the keyways radially inset from an outer diameter of the outer race; and a plate (570) attached to the center housing where the plate includes extending keys (578, 578?), each of the keys (578, 578?) being received by a respective one of the keyways (535, 535?) to restrict rotation of the bearing assembly in the bore. Various other exemplary devices, systems, methods, etc., are also disclosed.

Abstract: A variable geometry turbocharger assembly comprises a unison ring which rotates about a longitudinal axis defined by a shaft on which a turbine wheel and compressor wheel are attached in order to pivot a plurality of vanes and thereby control a flow of exhaust gas to the turbine wheel. The unison ring rotates on at least one guide pin which is secured to the turbocharger. The guide pins may be press-fit into apertures in a center housing at an outer pilot surface. In other embodiments the guide pins may be press-fit into a different part of the turbocharger such as a nozzle ring. The guide pins may each have a wear surface which defines a circumferential radius of curvature which is substantially equal to a circumferential radius of curvature of a radially inner surface of the unison ring.

Abstract: A variable geometry turbocharger assembly comprises a unison ring which rotates about a longitudinal axis defined by a shaft on which a turbine wheel and compressor wheel are attached in order to pivot a plurality of vanes and thereby control a flow of exhaust gas to the turbine wheel. The unison ring rotates on at least one guide pin which is secured to the turbocharger. The guide pins may be press-fit into apertures in a center housing at an outer pilot surface. In other embodiments the guide pins may be press-fit into a different part of the turbocharger such as a nozzle ring. The guide pins may each have a wear surface which defines a circumferential radius of curvature which is substantially equal to a circumferential radius of curvature of a radially inner surface of the unison ring.

Abstract: An exemplary center housing rotating assembly includes a turbine wheel; a compressor wheel; a center housing (510) that includes a through bore (515), extending from a compressor end to a turbine end along a bore axis; a bearing assembly (530) positioned in the bore where the bearing assembly includes an outer race (532) that includes keyways (535, 535?) extending from an axial end, the keyways radially inset from an outer diameter of the outer race; and a plate (570) attached to the center housing where the plate includes extending keys (578, 578?), each of the keys (578, 578?) being received by a respective one of the keyways (535, 535?) to restrict rotation of the bearing assembly in the bore. Various other exemplary devices, systems, methods, etc., are also disclosed.