Originally Posted by happycheapskate
You can get the fan blade off with a big flat blade screwdriver by gently prying and turning from under the center part, and prying the magnet out. They are free in the trash at computer stores.
If you peel the round sticker off of the back side of the fan frame it exposes the end of the motor shaft. The shaft is typically secured with a cheap plastic disc that snaps into a groove in the motor shaft. Pick the disc out and the fan blade comes off easily. No prying or gouging, chipping or cracking of the fan blade at all.