Question about Makita 5007MG 7 1/4 Inch Magnesium Circular Saw 15 Amp

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Makita "7 1/4 inch" circular saw poblem. the saw seems to lose power soon into ripping boards. if you letit sit andcool, it will work again, but will quickly cease upagain. the saw blade seems to go askew when ripping boards at an angle, and quickly gets jammed. i've had it in to the repairman twice, both times they just tried to make me feel like i dont know what im doing. i use a mechanically/electrically identical milwaukee saw for these exact tasks on the same exact electrical circuit. i am clueless, anything like this ever come up?

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Clean the armature and install new brushes, the armature is burned with carbon and loses its ability to conduct electricity properly. Make sure to in between every copper rib on the armature so it doesn't ground itself back out.

Posted on Oct 06, 2010

  • dmitrysm Oct 06, 2010

    thank you for your reply! i don't know if this changes anything, this saw hasn't seen over a dozen hours in action since i bought it new, and the brushes look new. the repairman checked the motor, said it "looks like its never been hot", and brushed me off. yet the thing wont cut. is there a reason why the blade would want to cut out of a straight line, jamming itself this way?

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My Makita DSS610 18v cordless circular saw stopped working mid cut. I changed the battery to another, fully charged, one but still nothing. Tried again next day, with both batteries, still nothing.


Hello Derek, it seems that your motor or motor brushes have failed please contact the manufacture about replacing the motor brushes.

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How to replace brushes when they will not come out normally?


I had the same issue. Turns out the brushes were fused into the brush mounts. I pulled on the copper end cap and wire only to break it off at the carbon brush end. I had to pull the motor out of the housing (stator) to expose the brushes. I then used a tool to push the carbon brushes back in and out of the brush mount assembly. You could also push from the outside in, just make sure you get all the carbon pieces and use a tool that won't put scratches in your brush housings. My brushes where well over 1/2 inch long....but they were just fused into the assembly, so the spring wasn't pushing it properly against the commutator, which I am guessing was the reason my saw just stopped in mid use....I had ripped a straight line in a board and stopped for a few seconds to reposition the saw only to find it no longer worked.

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1 Answer

While cutting saw jammed for a second or two and stopped . what part do i need to relace ?


Check the brushes and the fuse in the plug otherwise untill it has been opened up and check it is difficult to say.

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1 Answer

How to get motor out of houseing on a makita 5007MG circular saw


The armature and field will need to come out. It's quite a bit of work to swap everything over. Here is a parts diagram which should help.

Makita 5007MG diagram

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1 Answer

Where do I buy a power cord for a Makita circular saw and is it hard to replace?


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Instructions or diagrams on how to replace a power cord for a makita circular saw.


here's a article on how to fix it.
http://www.amazines.com/Electronics/article_detail.cfm/78565?articleid=78565

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There are for types of circular saws available. 1. Worm Drive - The motor is in line with the blade, delivering enough torque to carve up wet lumber or saw through concrete, which makes a worm drive ideal for framing or major renovation jobs. With the handle farther back, a user can better resist kickback and steer the 16-pound saw through long rips. 2. Sidewinder - The motor sits alongside the blade, making for a lighter (11 pounds or less) saw, which is more maneuverable over a long day than a worm drive. 3. Small Sidewinder - Weight, balance, and handle size are all key features to consider when choosing a saw that fits you. For a slight-bodied person, a small model may be more appropriate than a full-size sidewinder. 4. Cordless - Battery-driven models have increased in size as their power packs have gained voltage, making them convenient tools out in the field or when the electricity's not on. However, cordless models still have limited run times and generate less torque than corded saws. 5. Trim Saw - For finish work or paneling, this is your best choice. blades range from 3½ to 412 inches.

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