i bought a $16 impact drill. Problem is that there are sparks(though small) where i think the carbon brushes are :

 is that normal?

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As Re-design rightly says the sparks are perfectly normal & will become smaller & less noticeable as the brushes bed into the commutator.
lemonie5 years ago
As long as the sprites stay inside the drill you are safe from them.

rickharris5 years ago
Actually quite hard to prevent it.
Yes. Perfectly.
+1. And they should get smaller as the drill is used and the brushes seat.