Jointer Not Leaving a Smooth Surface

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Forum topic by stidrvr posted 11-12-2015 02:16 AM 1093 views 0 times favorited 11 replies Add to Favorites Watch
View stidrvr's profile


36 posts in 3501 days

11-12-2015 02:16 AM

Hey all,

I bought an 8” jointer about 5 months ago. I haven’t had a whole lot of time to use it until recently when I started a bathroom vanity project. Im surfacing White Oak and its leaving a rippled finish. Its like chatter, I can kind of feel it when Im surfacing but Im not sure if this is normal or not. The guy that had it before me put a new set of blades in and they’re super sharp! I believe I have the tables set correctly as I had to remove them to get it downstairs. I don’t have a picture of the surface so thats about the best as I can describe it. Any Ideas on what to check? I tried different feed speeds, and it doesn’t seem to matter with depth of cut.

Thanks in advance.

11 replies so far

View jmartel's profile


7955 posts in 2176 days

#1 posted 11-12-2015 02:17 AM

Most likely one of the blades is higher than the others.

-- The quality of one's woodworking is directly related to the amount of flannel worn.

View MrUnix's profile


6766 posts in 2225 days

#2 posted 11-12-2015 02:19 AM

+1 to the above ^^^^

Sounds like the guy you bought it from just threw in some new blades so he could sell the machine, and didn’t take his time to set them properly.


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

View Pezking7p's profile


3217 posts in 1677 days

#3 posted 11-12-2015 02:54 AM

Just move the wood slower. It’ll come out smooth as glass.

-- -Dan

View TheFridge's profile


9608 posts in 1512 days

#4 posted 11-12-2015 03:02 AM

Slower will work but the highest blade will dull quickly and way before the rest.

Sounds like a good time to learn jointer setup.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Pezking7p's profile


3217 posts in 1677 days

#5 posted 11-12-2015 03:05 AM

Ok. I guess I was assuming that the jounter was set up. If one blade was higher than the rest it wouldn’t cut a flat surface in any case.

-- -Dan

View iminmyshop's profile


284 posts in 2020 days

#6 posted 11-12-2015 03:13 AM

Second the running the wood through slower before messing with the blade alignment. Really slow.


View CB_Cohick's profile


485 posts in 1277 days

#7 posted 11-12-2015 01:15 PM

I was having the same trouble edge jointing some maple recently, and found that slower was the sauce, as mentioned by multiple others above. In addition, less downward force when feeding the boards through seemed to help also.

-- Chris - Would work, but I'm too busy reading about woodwork.

View teejk02's profile


481 posts in 1151 days

#8 posted 11-12-2015 02:18 PM

Pay attention to the direction of the grain also. Sometimes it’s hard to see until after a pass or two. And years ago I set my 6” jointer to only take very shallow cuts and I leave it there…more passes of course but works for me.

View rwe2156's profile


2965 posts in 1507 days

#9 posted 11-12-2015 02:37 PM

The knives are not set correctly.

You fix that by resetting the blades, not feeding the work slower.
You will need a knife setting jig or a dial indicator referenced off the table (my preference).
I try to get mine dead on but no more than .002.

Yes, feeding the work slower will improve the surface, even with properly set blades.

I always hit it with a hand plane or scraper anyway, so I’m not looking for a glass smooth surface right off the machine.

After you do that, I would check the tables for parallelism.

-- Everything is a prototype thats why its one of a kind!!

View stidrvr's profile


36 posts in 3501 days

#10 posted 11-12-2015 11:42 PM

OK, thanks guys. Ill check the blade heights.

View hhhopks's profile


651 posts in 2403 days

#11 posted 11-13-2015 12:49 AM

+1 on touching up with a hand plane.

-- I'll be a woodworker when I grow up. HHHOPKS

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