DeWalt circular saw stopped working, probably need to repair motor, can anyone confirm?

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by

user327716

Last Updated March 02, 2016 04:09 AM

Okay, so I got a a circular saw from the family for Christmas for my burgeoning woodworking hobby, and I've been using it a light amount. It went out the other day while cutting some 1x4. I had a little kicking while sawing through, but not too bad. Suddenly, the saw whirs down and dies. I think the battery is dead, so I switch. No good. I test with my drill, the batteries are both fine.

I've disassembled it fully and put it back together, verifying that there's no blockages, I can manually turn the spindle. Additionally, I've tested the circuit, and there's the ~18v getting from the battery to the spade connectors on the motor, but when I pull the trigger nothing happens. No sound, no motion, nothing.

The only thing in the saw I couldn't identify is some kind of square plate that rests abutting the motor housing. My suspicion is that it's a temperature sensor?

Anyone got suggestions to figure...

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Okay, so I got a a circular saw from the family for Christmas for my burgeoning woodworking hobby, and I've been using it a light amount. It went out the other day while cutting some 1x4. I had a little kicking while sawing through, but not too bad. Suddenly, the saw whirs down and dies. I think the battery is dead, so I switch. No good. I test with my drill, the batteries are both fine.

I've disassembled it fully and put it back together, verifying that there's no blockages, I can manually turn the spindle. Additionally, I've tested the circuit, and there's the ~18v getting from the battery to the spade connectors on the motor, but when I pull the trigger nothing happens. No sound, no motion, nothing.

The only thing in the saw I couldn't identify is some kind of square plate that rests abutting the motor housing. My suspicion is that it's a temperature sensor?

Anyone got suggestions to figure out what I need to do? It's a DCS391 model circular...

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This is a detailed video how I troubleshoot and repair my 27 year old DeWalt DW357 120VAC circular saw. The methods and illustrations may be useful in troubleshooting and repair of many other models or brands that are a simple 120VAC power tools. I test more than necessary for this repair to show how easy it is to check all of the circuitry.

All repairs to this tool are made with power unplugged. Working with 120 VAC electricity and a saw blade can be dangerous so if you do not feel comfortable with such a repair then by all means have your tool repaired by a professional.

Video taken with
Panasonic HC-V550

Video Edited with
Adobe Premiere Pro CC

Illustrations Created with
Adobe Illustrator

Soundtrack
“High In The Sky”
Created and Licensed by Sonicfire Pro

Voiceover was me,...

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Safety Announcement: Safety Recall on 7-1/4" Framing and Circular Saws

DEWALT Industrial Tool Co. is recalling to repair certain DW378G/DW378GT 7-1/4" Framing Saws and DC300 7-1/4" Circular Saws because the saw's lower blade guard may fail to fully close, leaving the blade exposed and presenting a risk of injury.

This recall to repair program involves only the following saws:

If your saw is affected, STOP USING IT IMMEDIATELY, and call DEWALT tool-free: 1-866/854-5214 between 8:00 AM and 5:00 PM Eastern Time, Monday through Friday to arrange for a free repair.

Recall done in cooperation with U.S. Consumer Product Safety...

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Well, I gave him a source and it looks like it's like $140 or so. Expensive.

I have a varied collection. DeWalt, Makita, Bosch and others. All seem to be well made. Dewalt reaaly messed up on an angle grinder case. You can't really store any accessories in it. They should leave enough room for the power cord doesn't get stressed and have enough room for a few accessories. Wire brush wheel, grinder wheel and a wrench for the wire brush. It barely fits.

You'll laugh why I bought the angle grinder. It removes the grass that grows between the pavement/sidewalk after killing it using the wire brush on the edge. I may have also needed it to slice through a cast iron pipe.

I bought a Harbor Freight Reciprocating saw, but haven't used it yet. I need to slice through a 4" drainage pipe buried 18" underground.

The jig saw is a Bosch and I absolutely love it. The harder tool to justify was a 20 ft-lb Bosch Demolition hammer. ebay and then rebuilt by me. Clay spade, 4"...

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Sure I could have used the rest of the donor battery case and made something that would clip in, but that would have made the saw longer and more awkward and not as well balanced. I couldn't insert it, or make a backward clip in because the Mikita battery was fatter than the original Dewalt.

Plenty of duct tape so you don't short it on something.

The saw runs great and cut 3/8 plywood well. It will stall if you try to start the cut too fast but once you're moving it cuts nicely.

I am not happy with this at all. The battery only last a few minutes. I am going to put a cord on it. A 12v 1.5 amp ac adapter barely spins it. The battery charger senses it not hooked up to a battery and does nothing. Maybe I could I could increase amps by putting several smaller transformers in parallel?

Dewalt is no help at all "This saw is designed to run using DEWALT 18v batteries, we do not recommend using any other power source for this saw. We do not have any other motor...

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The Miter Saw vs Circular Saw conversation features two of the most popular power tools in the DIY world, and advertising will certainly have you believe that you need both.

Is this true? Well, not exactly.

While each tool definitely has its own specific uses and distinct advantages, you certainly don’t need both to have a functional garage or woodworking shop.

In this article, we’ll discuss some of the key differences between miter saws and circular saws. We’ll go over what each one is used for, and talk about some specific situations where one is preferable over the other.

Perhaps we can help you decide which is better for you and your needs if you’re stuck between choosing the miter saw vs circular saw or vice versa.

General overview: Miter Saw vs Circular Saw

To put it bluntly, circular saws are infinitely more versatile than miter saws. If you’re trying to decide between one or the other to add to your shop, definitely go with the...

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Since the D24000 is a saw used mostly by professionals, I thought this would be the right forum for this thread.

The purpose of this thread is for D24000 owners to post usage tips and tricks, and problems they had with the saw and how they solved them.

Since I've had some problems with mine and believe I've solved them, I'll go first.

The Problem
Long cuts not straight or square:

- While crosscutting 18" limestone, the first 2-3 inches (the end farthest away from the fence) were as much as 1/16" out, then the cut straightened out a bit.

- Some cuts were fairly consistently out of square by as much as 1/16" to 1/32" out. By "consistently", I mean that the cut was straight, but was off square by 1/16" to 1/32" in the back and touched my square in the front. I.e. instead of 90 degrees the cut was maybe 91 degrees.

- I also found that the cutting bed could be twisted left and right when just two sets of wheels were on the rails - the...

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I have a small hoard of Dewalt 18v tools that I have been working on for 8 years or better. I use them almost daily during work season and other than the occasional burned up drill or battery they seem to hold up okay for my uses.

I have been working side by side with a guy for about two weeks that uses the Milwaukee M18 fuel stuff though and it is really impressive, almost impressive enough to make me want to sell out my Dewalt stuff and switch brands.

Aside from the somewhat large cash investment up front, is it worth it to upgrade for long term? I will admit I like the M18 batteries and chargers better, but in reality my 18v stuff can keep up just fine. I just don't really know what the advantage to going brush less is. Anyone know? Even if I didn't go with Milwaukee I believe Lowes has a program to trade up to the brushless 20v stuff from Dewalt if you take in old stuff.

Input from guys that use the stuff professionally is especially...

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Customer Comments

My first expierience with y'all: I had been looking for replacement parts for some of my most treasured tools for as long as I can remember. I found you folks and the world got a little brighter. The parts are exact replacement parts and I recieved them in a matter of days without being gouged for shipping and "handling" They
screwed right in place on my wounded tools and and I am reunited with some old friends that help my creativity flow once again. I am a Proud fan of yours now and am telling everyone of your restorative powers. Thanks so much and best wishes in this questionable economy.

Pete B.

Innovation from the Start

When pressed to find a way to get more on-site work done faster, Raymond DeWalt more or less invented the radial arm saw by attaching a motor and saw to a yoke that could bevel, slide, raise and lower. In 1936 he established the brand and the rest is history.The company has continued to grow...

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