Dewalt DW618 noised motor and almost no power - Router Forums
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post #1 of 34 (permalink) Old 01-03-2016, 03:14 PM Thread Starter
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Default Dewalt DW618 noised motor and almost no power

This weekend my Dw 618 started to make a different noise (sounding really nasty) and lost your power. I immediately turned off and open the cap to see if was anything broken or burned. It's seems everything is ok. I'd spin the center post (communicator?) It spun freely it didn't feel like it was grinding on anything. So I suspect about carbon brushes.

Are these brush motor heads bad? Is this may be the problem?



I take some pictures and made a little video to help.





Youtube video:
youtube.com/watch?v=_-CyXYR5Hxc
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post #2 of 34 (permalink) Old 01-03-2016, 03:52 PM
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Hi Joel. Welcome to our little corner of the 'net.

Brian


Sometimes I wonder whether the world is being run by smart people who are putting us on
or by imbeciles who really mean it.

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post #3 of 34 (permalink) Old 01-03-2016, 04:33 PM
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Hello and welcome to the forum. Joel
looks to me like that brush needs replaced

Looking forward to your participation.
Filling out your profile to include (first name,tools and short bio is strictly (optional )but does help members to better relate to each other.
Thank You John
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post #4 of 34 (permalink) Old 01-03-2016, 04:53 PM
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Hi Joel and welcome. Where the brush makes contact with the commutator doesn't look that good. It looks rough and it shouldn't be. The other main cause of noise is bearings so roll the shaft over quite a few times by hand and see if you can feel rough spots. If you do they need replacing.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #5 of 34 (permalink) Old 01-03-2016, 04:57 PM
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Hi, Joel; welcome!
Great pics...we love pictures.
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post #6 of 34 (permalink) Old 01-03-2016, 05:05 PM
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Welcome to the forum Joel. Was this router mounted in a table when it started making noise ? If so make sure a small screw or something hasn't gotten inside . Not sure if that is possible but makes one wonder . Those brushes don't look great IMO

I donít always insulate , but when I do .
Ok ,I never insulate

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post #7 of 34 (permalink) Old 01-03-2016, 05:49 PM
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take a good look at the commutator something tore up the end of that brush!
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post #8 of 34 (permalink) Old 01-03-2016, 06:03 PM
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Quote:
Originally Posted by Semipro View Post
take a good look at the commutator something tore up the end of that brush!
That's what I was wondering John , that doesn't look like normal wear

I donít always insulate , but when I do .
Ok ,I never insulate
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post #9 of 34 (permalink) Old 01-04-2016, 05:44 AM Thread Starter
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Quote:
Originally Posted by TheCableGuy View Post
Welcome to the forum Joel. Was this router mounted in a table when it started making noise ? If so make sure a small screw or something hasn't gotten inside . Not sure if that is possible but makes one wonder . Those brushes don't look great IMO
No. It doesn't.

Quote:
Originally Posted by Cherryville Chuck View Post
Hi Joel and welcome. Where the brush makes contact with the commutator doesn't look that good. It looks rough and it shouldn't be. The other main cause of noise is bearings so roll the shaft over quite a few times by hand and see if you can feel rough spots. If you do they need replacing.
The bearings seems to be Ok. I roll it the by hand and dont feell nothing abnormal.

Today I realized that speed control isn't work either. Due the commutator issue the motor can rotate to your full rpm.
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post #10 of 34 (permalink) Old 01-04-2016, 08:29 AM
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Joel, The noise is most likely from a bad bearing causing it to run untrue and caused the chipping on the brushes. Another cause of brush failure is using too small of a cord for the amperage draw of the motor...but I suspect the bearings.
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