The printables/thingiverse curse: There are already so many variants of things like this, that it is harder to choose than to create a new one from scratch.
So, here you go, another one. This one is for up to 8 blades. The blades are held by the notch in the central hub.
It is intended to be printed lying on its “back”, i.e. the way the model is oriented. No supports necessary.
The author marked this model as their own original creation.