An exemplary housing for a rotor of a turbocharger includes a bore,
defined at least in part by the housing; a pair of rotor limiting
surfaces positioned at a first diameter, one rotor limiting surface
positioned proximate to a turbine end of the housing and the other rotor
limiting surface positioned proximate to a compressor end of the housing;
a rotor damping surface positioned at a second diameter, intermediate the
pair of rotor limiting surfaces; and an opening to receive a pin to
axially locate a squeeze film bearing cartridge in the bore of the
housing. Various exemplary bearing cartridges, housings, assemblies,
etc., are also disclosed.