Question about Dewalt Chop Saw D28700
You have to pull on it to remove it or
use a punch and hammer on the end of armature(gear side)be careful to not damage teeth if you want to reuse it
Posted on Feb 22, 2014
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Posted on Jan 02, 2017
I worked at a tool rental center while attending college and learned to repair tools such as yours. Damage to the armature occurs mostly during low power situations or overloading the motor. The damage is usually visable. Notice burned looking copper windings or commutator bars. You can test with growler or meter. We would turn the commutator on an armature lathe to true the surface of the bars. If the commutator is not perfectly round the brushes will bounce thus cause the sparking that you see. Also you must clean the groves between the bars with a blade to clean out all metal filings that can cause short between bars. (Broken hacksaw blade ground to fit the groves will work fine)Sanding with sandpaper may not be perfect enough to stop sparking assuming the armature is not shorted. Moisture will not effect the brushes, and sanding them square is ok but you can put the curve back by cutting fine sandpaper into strip and wraping it around commutator and insert brush into holder against sandpaper. Not necessary thou because all new brushes are square. New brushes however will increase the tension of the brush against the commutator preventing bounce due to new spring and longer carbon. Good luck enjoy
Posted on Dec 18, 2008
SOURCE: Metal chop saw blows breaker
Is there anything else running while you are cutting? If not is the breaker 15 amp or 20 amp. If its 15 amp, I would change it to a 20 amp breaker. Make sure the wires are thick enough to handle the extra load. If this isn't the problem check the cord from the saw to the outlet.
Posted on Aug 23, 2009
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