Sliding bearing, method for producing a sliding bearing, internal combustion engine having a sliding bearing and electric machine having a sliding bearing

A method for producing a sliding bearing, comprising:

• providing a bearing bush including a sintered bearing bush material having a residual porosity of at least 8 percent;
• providing an uncoated shaft including a shaft material, the shaft slidingly and moveably guidable within the bearing bush;
• and
• filling 80 percent or more of a volume of the residual porosity of the sintered bearing bush material with an oil via introducing the oil into the residual porosity in an impregnating operation at a pressure of 1 mbar to 850 mbar and at an oil temperature of 42° Celsius to 97° Celsius.

An electric machine, comprising:

• a sliding bearing including an uncoated shaft and a bearing bush, the uncoated shaft including a shaft material, the bearing bush including a sintered bearing bush material having a residual porosity of 8 percent or more;
• a stator;
• a rotor rotatably mounted on the stator and rotatable relative to the stator via the sliding bearing;
• wherein the shaft is slidingly and moveably guided, relative to the bearing bush, within the bearing bush;
• and
• wherein a volume of the residual porosity is filled with an oil up to 80 percent or more.