dado tearing out

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Forum topic by jamfu posted 11-15-2015 11:09 PM 717 views 0 times favorited 4 replies Add to Favorites Watch
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24 posts in 1161 days

11-15-2015 11:09 PM

I just got a brand new freud dado set , and i am making drawers out of poplar. the damn thing is tearing out the back side of all the finger joints. can anyone tell me why a new blade would do this? i am making half inch fingers with half in thick stock. it looks terrible, and i would not have expected this for the price i paid for the dado set.

4 replies so far

View johnstoneb's profile


3070 posts in 2406 days

#1 posted 11-15-2015 11:19 PM

That is the way of dado sets it doesn’t matter how much you paid for it. You need a backer board.
All saw blades will tear out when cutting like that to some degree dado sets just do it worse. When cutting box joints on table saw or router table I always use a backer.

-- Bruce, Boise, ID

View Kazooman's profile


1264 posts in 2186 days

#2 posted 11-15-2015 11:22 PM

Not sure just how you are making the cuts. Most any blade or dado stack can, and will, tear out the back side of the cut if the workpiece is not supported. For cutting finger joints most would use a jig that does several things at once. It sets the space for the first cut, and then sets the spacing for all of the subsequent cuts, and it provides a perfect backing to prevent tear out in the stock.

View woodbutcherbynight's profile


5824 posts in 2642 days

#3 posted 11-15-2015 11:26 PM

You could use a backerboard. Myself I use blue tape before I cut to eliminate this problem. I have access to 2” tape free so it is never an issue how much I use, have no idea how much it costs normally.

-- Live to tell the stories, they sound better that way.

View jamfu's profile


24 posts in 1161 days

#4 posted 11-16-2015 12:07 AM

ok damn .. i should have done that

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