PUMP, IN PARTICULAR HIGH-PRESSURE FUEL PUMP

Disclosed is a pump, in particular a high-pressure fuel pump, comprising at least one pump element () that has a roller tappet () inside which a roller () is rotatably mounted on a bearing bolt () by means of a bearing sleeve (), said roller () rolling off a cam () of an input shaft (). The bearing sleeve () is made of a plastic material, especially polyether ether ketone (PEEK) or polyphthalamide (PPA).