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Forum topic by Rburgess0903 posted 07-10-2018 01:33 PM 376 views 0 times favorited 6 replies Add to Favorites Watch
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Rburgess0903

3 posts in 378 days


07-10-2018 01:33 PM

Hey guys..
Need a little advice. Have a 2hp router, about a year old. Yesterday I turned it on and smelled aan electrical burning smell. Pulled the brushes out and one was a little unevenly worn, so I fixed it put them back in and still smells. Pulled off vent cover, blew air through it but no luck.. Could this still be a brush problem, bearings or is the motor just going out.. I see sparks through the vent when on but not shooting out the back or anything and it doesn’t run hot. Thanks for any advice.


6 replies so far

View Gene Howe's profile

Gene Howe

11638 posts in 3851 days


#1 posted 07-10-2018 03:05 PM

What brand router?

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View LesB's profile

LesB

2134 posts in 3866 days


#2 posted 07-10-2018 04:28 PM

There are two different odors that could come off the router. One is from over heated wiring the other is the Ozone created by the brushes. Burned wiring odor is usually acrid and unpleasant the ozone is somewhat like the air smells after a thunder storm. There will almost always be visible sparks from the brushes but they should not be excessive. New brushes may create more sparks until they are fully seated on the armature. When you say you fixed the brushes I assume you installed new ones??

If the problem was the bearings you should hear a lot more noise but you should manually check them. If they don’t roll smoothly I would replace them. Try to avoid bearings made in China.

-- Les B, Oregon

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MrRon

5576 posts in 3666 days


#3 posted 07-10-2018 07:55 PM

Sounds like the motor is getting overheated and the insulation is starting to burn. Are you blocking the openings in the router from getting air circulation? Sometime a user blocks off the router by the way he is holding onto it. Open it up and see if you can see any burned insulation. If so you may be able to add shrink wrap insulation to save it.

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Rburgess0903

3 posts in 378 days


#4 posted 07-11-2018 12:47 AM

Hey guys, thanks for the comments. It’s just a HF 2hp router, so I didn’t expect it to last forever, but still only been a year..LesB it’s that electrical burning smell, like when you have an outlet in your house going bad.. no I didn’t actually replace the brushes, had no extras, like I said only 1 was offset worn, I just took a fine grit dremel drum and sanded it down a bit, but when I took them back out the next day both had new chips and scratches.. I believe it is the wire coating coming off too, but the brush damage confuses me..bearings are fine, checked them last night as well.
MrRon, it’s in a router table, but I pretty compulsive about cleaning and vacuuming it after every use.. I was using a straight 1/4 bit that I haven’t sharpened in a while, I think I just overdressed the motor and heated it… it is just a HF router.. when I bought it I didn’t do too much routing, now it’s the most used item I have. Guess I need to spring for the higher end ones..
Thanks all!

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Rburgess0903

3 posts in 378 days


#5 posted 07-11-2018 12:48 AM

Overstressed… lol

View MrUnix's profile

MrUnix

7409 posts in 2621 days


#6 posted 07-11-2018 12:55 AM

It’s just a HF 2hp router, so I didn’t expect it to last forever, but still only been a year..

Motor size really doesn’t matter much in terms of longevity – I have some old 1hp routers that are over 30 years old and still going strong.

no I didn’t actually replace the brushes, had no extras, like I said only 1 was offset worn, I just took a fine grit dremel drum and sanded it down a bit, but when I took them back out the next day both had new chips and scratches.. I believe it is the wire coating coming off too, but the brush damage confuses me..bearings are fine, checked them last night as well.

Once brushes get to a certain point, you have to replace them – facing them up doesn’t do much, and cleaning and undercutting the commutator may also be required. Curious as to how you ‘checked’ the bearings… the only real way to determine the condition of a bearing is to pull off the seal/shield and examine the races, cage, balls and grease. A bearing can, from outward appearance, appear to be just fine – but internally it’s a different story and could be on it’s last leg. HF isn’t known for using top quality bearings either.

Bottom line is that to be sure, you need to open it up and look.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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