Abstract: An exhaust gas turbocharger may include a bearing housing and a rotor. The rotor may have a shaft mounted in the bearing housing via two radial bearing bushes. Each radial bearing bush may have an inner surface facing the shaft. The inner surface may have a single chamfer, where the single chamfers of the two radial bearing bushes face one another, or two chamfers, where one of the two chamfers for each of the two radial bearing bushes facing one another are larger than the other of the two chamfers for each of the two radial bearing bushes facing away from one another.

Abstract: A supercharging device may include a rotor mounted in a bearing housing via at least one bearing bush. The bearing bush may include an oil bore. An oil film may be disposed at least one of between the rotor and the bearing bush and between the bearing bush and the bearing housing. The bearing housing may include at least one oil feed duct for lubricating the bearing bush. At least one of the oil feed duct and the oil bore may be configured with respect to the bearing bush such that the bearing bush during the operation of the supercharging device is positively accelerated in a direction of rotation of the rotor via an oil jet communicated from the oil feed duct.

Abstract: An exhaust gas turbocharger may include a bearing housing and a rotor. The rotor may have a shaft mounted in the bearing housing via two radial bearing bushes. Each radial bearing bush may have an inner surface facing the shaft. The inner surface may have a single chamfer, where the single chamfers of the two radial bearing bushes face one another, or two chamfers, where one of the two chamfers for each of the two radial bearing bushes facing one another are larger than the other of the two chamfers for each of the two radial bearing bushes facing away from one another.