ELECTRIC MACHINE

An electric machine for a drivetrain of a motor vehicle may comprise: a rotor with a rotor laminated core; a stator with winding heads on opposite end faces; and a housing with a a cooling liquid reservoir. The rotor core comprises multiple stacked laminations each with an aperture connecting the end faces to one another. The apertures of adjacent laminations are offset in a circumferential direction so: a first helical cooling channel connects an inner region of the core to a first end face; a second helical cooling channel connects the inner region of the core to a second end face; and the first cooling channel and the second cooling channel are oriented oppositely with respect to one another and are connected via a passage within the rotor laminated core to a feed line conducting the cooling liquid within the rotor shaft.