Shaking Router with a 3/4 inch bit.

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Forum topic by TheWoodFish posted 10-11-2014 04:58 AM 1547 views 0 times favorited 14 replies Add to Favorites Watch
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15 posts in 1353 days

10-11-2014 04:58 AM

I have a 2 Horsepower Fixed Base Router from Harbor Freight that I’ve connected to my G1023RLW table saw.
It works fine (other than the fact that it’s really noisy).

The problem starts when I’m using a BIG 3/4×2-Inch Cutting Length bit with 1/2 inch shank:

The router starts shaking the entire table saw! it’s impossible to work like this… (and dangerous)

Does anyone have an idea to prevent the shaking? Is it the router? is it the bit? (it’s a brand new bit… Never been used.)

14 replies so far

View vskgaming's profile


83 posts in 1613 days

#1 posted 10-11-2014 05:30 AM

I am not an expert by any means, but the first thing that comes to mind is; have you seated the bit correctly? I mean is the shank sticking out of the collet more than what is considered safe?
Are you taking light passes or trying to remove more material in a single pass?

Just my 2 cents..


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15 posts in 1353 days

#2 posted 10-11-2014 05:34 AM

the bit is not all the way into the shank. it’s about 1/4 inch out. I believe it’s fine. I have to do that otherwise, I won’t be able to use the bearing. But I believe it’s sitting properly.

The shaking happens right when I start the router. I didn’t have the courage to use it when it’s shaking like that.

View Chris208's profile


239 posts in 2268 days

#3 posted 10-11-2014 06:22 AM

The first thing that comes to mind for me is that you’re using a Harbor Freight router.

Eek! Stop using it before you get a chunk taken out of you.

View MrUnix's profile


6710 posts in 2197 days

#4 posted 10-11-2014 07:37 AM

What model router? The current 2HP fixed base router (Model 68341) says it’s a fixed speed of 28,000 RPM, which seems way fast for that bit.


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

View upinflames's profile


217 posts in 2160 days

#5 posted 10-11-2014 08:02 AM

I have the same router in a table, noise is normal from any router. I would bet two frogs teeth and couple of pig scales that it is the bit. That router is a work horse, I’ll put it up against my PC 690’s any day. The speed should not be a factor with that bit, I run bigger than that full blast. Invest in the router speed control from HF, yep I said from HF. The myth that you get what you pay for is just goofy, it’s a crap shoot with any brand these days.

View InstantSiv's profile


262 posts in 1593 days

#6 posted 10-11-2014 12:14 PM

If you can chuck it in a drill/press to see if it vibrates. If it does it would indicate a problem with the bit. If it doesn’t it would indicate a problem with the router.

Might try Home depot tool rental for drills with large enough chucks.

I have 2 HF routers. The larger plunge and the fixed based. They have bit/base alignment issues but I use bearing bits in the fixed base and can live with the sloppy plunge. Knowing those limitations I would buy again.

View mrg's profile


823 posts in 2997 days

#7 posted 10-11-2014 12:18 PM

Does the router vibrate with other bits? Have you tried putting the bit all the way into the collet the way it should be and see if it vibrates only with this bit not seated all the way down then get a collar extension. That is a two inch long bit how thick is the table that you have to bring the bit a 1/4 inch out of the collet to get the cutting height?

-- mrg

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Charles Maxwell

1099 posts in 3805 days

#8 posted 10-11-2014 01:03 PM

One word – bearings. The tolerance of the bearings is poor. That’s been my own experience with cheap electric tools. Do yourself a favor and spend a few more dollars and buy German or Japan made tools.

-- Max the "night janitor" at

View tefinn's profile


1222 posts in 2435 days

#9 posted 10-11-2014 01:37 PM

What model router? The current 2HP fixed base router (Model 68341) says it s a fixed speed of 28,000 RPM, which seems way fast for that bit.


- MrUnix

I agree with Brad. Your router speed is too high. You’ll need to get a speed control to lower the RPM’s. I’d probably run that in my PC between 15 and 18,000 RPM.

Length of the bit as well as diameter of bit determine the max speed you can run. With some brand routers you could get away with that speed, but you’ve got a HF tool, quality varies greatly with their stuff. I’ve also linked to a site that has some good info about speed vs. bit size.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View JAAune's profile


1798 posts in 2314 days

#10 posted 10-11-2014 03:21 PM

Something is loose or out of balance. It could be the bit, the bearing or perhaps the collet that is no good.

-- See my work at and

View TheWoodFish's profile


15 posts in 1353 days

#11 posted 10-11-2014 03:55 PM

Update: placing the router beat all the way into the collet, reduces the problem significantly.
However, I stillI don’t feel comfortable using it that way.

The manufacturer doesn’t have specification for three-quarter diameter. They only specify 24,000 RPM for 1 inch diameter. So I believe 28,000 RPM for three quarters should be okay. I’ll might go with the option to buy the router speed control from Harbor freight tools.

Still this will not solve my problem because that is too low now. I need to find some kind of extension for that collect. I bet that extension will resume the shaking.

View hobby1's profile


335 posts in 2295 days

#12 posted 10-11-2014 06:22 PM

maybe, it could be the setup on the tablesaw extension table, looking at a picture of it, it has long thin extension legs for its support, as well as how far it is located away from the cabinet of the saw itself, the table is cantelevered, so any vibration from the router could possibly be amplified,
hand hold the router, and using the same bit, turn it on, and see if you get a lot of vibration in your hands, comparing it with different size bits, that would be the only way to determine if it is the router the bit or the table it is used in.

View hoosier0311's profile


706 posts in 2023 days

#13 posted 10-11-2014 07:48 PM

To me it seems easy enough to take that bit out and see if it still shakes?

-- atta boy Clarence!

View TheWoodFish's profile


15 posts in 1353 days

#14 posted 10-13-2014 01:37 AM

Ok. I’ve done all the tests suggested.

The router is absolutely fine. Working perfectly with any other bit, when it’s attached to the table saw or even when it’s being held by hand.

The bit that I got is probably faulty and unbalanced. I’ll have to send it back.

Guys! Thanks again for all the help. I LOVE this forum.

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