I have a 240 v impact wrench. It`s a Sealey with about 500 lb ft of pressure. Noticed when working it you can see sparks in region of commutator. It`s had very light use. Does this sound normal?
Alex
Yes, you will always get some sparks as the carbons wear and arc when the commutator rotates. That is partly why they are made of a sacrificial soft material, so you can change them rather than the commutator.