I can add the information that the original part can be purchased from Gastroback (the Gastroback 42639 is identical to the Breville and Sage Smartgrinders). As their representative politely wrote to me: You need the „Fan“ (98312) It costs 1,49€ + freight + VAT.
I forgot check this Ifixit post before reinstallation and simply tapped the impeller gently into place. It was a bit worrying while I did it as I realized that I was close to damaging a much more expensive part of the machine - it did work however..
Cheers Jacob Jacobsen
Quando isso acontecer, você poderá ver um gráfico da reputação que ele adquiriu ao longo do tempo.
Aqui está uma prévia de como será o gráfico:
Nenhuma reputação adquirida ainda.