I think it should be heated up, and it’s likely to come apart. Wrap it in some soft cloth, clamp it in a vise, heat the rim all around (e.g., with a gas burner), you’ll need a screw “510” which you screw into it, but at least 10cm, and a lock nut, and a large washer, this way you lock the washer at the screw head, once this is done, then with a small hammer, alternately tap the fixed washer from below and from above, and this way it might slide out.
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