A Little Info About Carbon Brush 

Hey there everyone!
To insure a long lasting power tool it is important to regularly
check the carbon brushes. As worn-out brushes may damage
the commutator of the armature and damaged commutator
can be a pain to replace or repair.
The quality of the brush must also be good, it must be hard
but not hard enough that it can scrape off the segments of the
commutator. It must also resist heat to some extent, as some
low quality carbon brush becomes brittle with heat.
A consideration must also be given to the carbon brush holder.
A little bit of cleaning can free it from a blockage, insuring
electricity will flow from the armature.
Thanks for watching the video, if you do have a questions, suggestions or request kindly leave a comment down below.