How durable are most fans?

[Brandon_51]

is it possible to bend cpu fan's plastic fins? would it cause imbalance?

 

[Justiceinacan]

Yeah, you might also skew the rotation a bit. Why do you need to do so?

 

[USAFRet]

is it possible to bend cpu fan's plastic fins? would it cause imbalance?

Yes, it would probably unbalance the fan, at the very least.
Why are you wanting to do this?