Datto Tearout

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Forum topic by nailhead49 posted 04-03-2010 03:15 AM 891 views 0 times favorited 6 replies Add to Favorites Watch
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8 posts in 2654 days

04-03-2010 03:15 AM

Topic tags/keywords: question

I been working on some tenens with no problem, them change set up then went back to the first, now I have tear out, even made a zero clearance throat plate, no change, blades going the right way. Using oak. What did I do?

-- David R

6 replies so far

View oluf's profile


260 posts in 2459 days

#1 posted 04-03-2010 03:30 AM

Dull tools, missalignment, or taking to deep a cut. Are you cutting with the grain or cross grain?

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

View bigike's profile


4048 posts in 2708 days

#2 posted 04-03-2010 04:23 AM

cuttin oak to fast, would be my guess.

-- Ike, Big Daddies Woodshop,

View SnowyRiver's profile


51452 posts in 2900 days

#3 posted 04-03-2010 02:24 PM

I think those above have covered it. Try slowing the feed rate down and be sure the blade is sharp and aligned.

-- Wayne - Plymouth MN

View knotscott's profile


7145 posts in 2795 days

#4 posted 04-03-2010 05:08 PM

Changing from going with the grain to across the grain can cause tear out. Also, some oak is more prone to tear out than others. Some dado blades are more prone to tear out than others, and all dado blades are more prone to tear out if dull and/or dirty. Everything mentioned so far is a variable and a potential cause.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View Bill White's profile

Bill White

4405 posts in 3380 days

#5 posted 04-03-2010 07:14 PM

What dado head are ya usin’? How many teeth are on the outer blades? Are ya sure you have the left and right side outer blades installed correctly?
Gotta ask all the questions….


View juniorjock's profile


1930 posts in 3185 days

#6 posted 04-03-2010 11:50 PM

You could try using a backer board. I’ve also used tape on the back of the board with good results. Just don’t try using the tape on a board that you will have a cut-off on. Some good tips here. I agree that you should clean the blades first. What brand dado set are you using?

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