The invention relates to a screw press (1) for a screw press separator (2), comprising a main core (10), at least one screw flight (11) on the main core (10), and a wearing element (12) that includes an additional core (13) and at least one screw flight section (14) on the additional core (13). The main core (10) and the additional core (13) can be inserted into one another in such a way that the screw flight (11) transitions into the screw flight section (14).
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