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China j1x-210a chop of saw .armature sparks

Armature sparks

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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.

Good luck!!

Posted on Aug 23, 2009

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1 Answer

Can i remove my armature 2414 from winding and how in what way?


If it is the old style 2414 remove the 4 screws holding the guard on. Take the brushes out, you should then be able to lift the main gear housing out of the machine bringing the armature with it. If the housing come away but leaves the armature in the main housing then tap the side edge of the housing with a soft mallet. In extreme cases remove the vent cover from the left of the machine and tap the end of the armature with a suitable item.

Jan 28, 2013 | Makita 2414 14" Cut-off Chop Saw Free...

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10'' delta mitre saw making bad noise when in use


Highly unlikely the armature would warp. Both front and rear armature bearings would be my first guess.

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Can a ryobi chop saw armature be rewound


if you have the proper machinery, It would be cheaper to replace it than trying to find someone that can rewind it.

Jan 12, 2012 | Ryobi Saws

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Bad arcing were brushs meets armature, installed new brushes and cleaned armature same thing happens


From snor38@gmail.com Hi dkhallquist. When you cleaned the comuntator did you carfully clean the groves as they may have enough trash to make the brushes ride roughly on the comuntator.

May 07, 2011 | Milwaukee 6180-20 14" Chop Saw Abrasive...

1 Answer

Armature is shorting out, throwing sparks out rear cap/ has new brushes (thought that was problem / shows small burnt area on armature / i cannot figure out how to remove armature / I stripped saw down to...


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

Oct 03, 2010 | Dewalt Chop Saw D28700

1 Answer

6180-20 chop saw trips 20 amp on start up all the time Terry


If it trips the breaker as soon as you hit the switch, check the power circuit. Check the power cord for frays or cuts, especially where the cord goes into the saw. Remove/split the handle and check the wires into and out of the switch and to the brushes and field. Lood for burned or melted wires or case parts. Milwaukee is notorious for running lots of small wires in very tight places. Make sure none of them got pinched when the tool was assembled. Watch for this also when you reassemble the saw. Check the brushes, if they're worn or broke they can cause a short on the armature. If these all check out you need to have the armature checked on a growler for shorts.
If the saw runs for a few seconds then trips the breaker I'd check for gear and bearing problems. Cehck for free, smooth movement of the bearings on the armature and blade drive assembly. The blade should turn freely by hand. Feel for undue resistance or a gritty feel in the bearings and gears. If necessary replace any offending parts.

Aug 31, 2010 | Milwaukee 6180-20 14" Chop Saw Abrasive...

2 Answers

Sparking at the carbon brush of circular saw every switched on.


the armature is shorting across the commutator bars and a new saw will be cheaper than a new armature

May 21, 2010 | Bosch 7 - 1/4" Skilsaw Circular Saw

1 Answer

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.

Good luck!!

Jul 28, 2009 | Dewalt Chop Saw D28700

3 Answers

My Dewalt chopsaw is loosing power and sparks heavy in brushes


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

Dec 15, 2008 | Dewalt Chop Saw D28700

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