It's physically capable, but it's not the intended use and could void your warranty.
Using it as a grain mill or for other dry grinding is an alteration from its designed purpose.
More critically, such modification or using the blender in an unauthorized way may cause fire, electric shock, or injury and will void your warranty.
Stick to processing standard recipes when learning to use the blender. That's the safest way to avoid overloading it or causing damage.
Any repair needed from using it for unintended purposes won't be covered. If you're set on grinding, look into a dedicated grinder.