como cambiar los bujes de ventilador

Replacing the hubs on a Chinese Panda brand fan. Hubs with a 10-millimeter inner diameter by 20-millimeter outer diameter. If the video was helpful, you can help me with a donation of $100 Argentine pesos (less than $0.20 dollars) http://mpago.la/1LhZWT1 Donation of $200 Argentine pesos (less than $0.40 dollars) http://mpago.la/1oWncFh Donation of $500 Argentine pesos (less than $1 dollar) http://mpago.la/2D791Fo Thank you very much