A separator, which features the following: a. a centrifugal drum with vertical rotational axis, b. a drive spindle for the centrifugal drum, which by a neck bearing and a foot bearing is rotatably mounted in a drive housing which encloses or forms a drive chamber, c. an electric motor, which has a stator and a motor rotor, d. wherein the motor rotor is arranged in the drive chamber of the drive housing directly on the drive spindle in the axial region between the foot bearing and the neck bearing, e. wherein the stator is also directly supported in the drive housing and wherein an air gap exists between the stator and the motor rotor, f. wherein the stator and the motor rotor are arranged between the neck bearing and the foot bearing in an open manner in the drive chamber which is otherwise completely or in the main closed toward the outside, g. wherein provision is made for a lubricating system for the lubrication of especially the neck bearing and the foot bearing by means of a lubricant, which is wholly or partially integrated directly into the drive chamber, characterized in that at least the following features are also realized: h. provision is further made for a coolant circuit for a free flowable coolant, which is wholly or partially integrated directly into the drive housing, i. wherein the coolant system, at least in certain sections, is adjacent to a lubricant channel for the passage of liquid and, in the drive chamber, flowing lubricant and in that it is also adjacent, at least in certain sections, to the stator, j. the stator has a flange section for locating, especially resting, on a corresponding collar section of the drive housing. a. a centrifugal drum with vertical rotational axis, b. a drive spindle for the centrifugal drum, which by a neck bearing and a foot bearing is rotatably mounted in a drive housing which encloses or forms a drive chamber, c. an electric motor, which has a stator and a motor rotor, d. wherein the motor rotor is arranged in the drive chamber of the drive housing directly on the drive spindle in the axial region between the foot bearing and the neck bearing, e. wherein the stator is also directly supported in the drive housing and wherein an air gap exists between the stator and the motor rotor, f. wherein the stator and the motor rotor are arranged between the neck bearing and the foot bearing in an open manner in the drive chamber which is otherwise completely or in the main closed toward the outside, g. wherein provision is made for a lubricating system for the lubrication of especially the neck bearing and the foot bearing by means of a lubricant, which is wholly or partially integrated directly into the drive chamber, h. provision is further made for a coolant circuit for a free flowable coolant, which is wholly or partially integrated directly into the drive housing, i. wherein the coolant system, at least in certain sections, is adjacent to a lubricant channel for the passage of liquid and, in the drive chamber, flowing lubricant and in that it is also adjacent, at least in certain sections, to the stator, j. the stator has a flange section for locating, especially resting, on a corresponding collar section of the drive housing.