Originally Posted by Randy_Pike

Fans braking is often a product of the environment that the esc is being used in. If there are lot of small rocks that will find their way into the shroud area, you'll break fans.

You can use some small "screen" to help prevent this, but make sure it doesn't slow the air flow down.

Most 1/8 buggies when setup correctly don't' need the fan to begin with, fyi.