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Dove tail cutting table saw blade?

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Forum topic by Cole Tallerman posted 09-06-2012 07:59 PM 2355 views 0 times favorited 8 replies Add to Favorites Watch
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Cole Tallerman

392 posts in 874 days


09-06-2012 07:59 PM

I cant seem to figure out why these haven’t been invented. couldn’t it be used the same way as a router jug or a table saw box joint jig? Feel free to explain why this wouldn’t work, I just cant figure it out.


8 replies so far

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Loren

7736 posts in 2337 days


#1 posted 09-06-2012 08:26 PM

It works. You need a flat bottom blade for cutting the pins
and a pair of blades custom ground for the tails. The method
is not much different than cutting dovetails with a bandsaw
though of course the work is held on end rather than on
its face.

You can tilt the blade one way to correspond with the angle
of the grind and for the other side you need to make a
jig to hold the work in a tilted position. Having one table
saw that tilts left and another than tilts right gets around
the need for the jig.

In a small production run a radial arm saw could be made
to cut all the tails in two set ups without jigs. The pins
could not be cut so easily on the RAS.

-- http://lawoodworking.com

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David Kirtley

1281 posts in 1687 days


#2 posted 09-07-2012 12:21 AM

The only down side is that the corners would have to be cleaned out by hand where the blade can’t get into the corner of the tail. A chisel would get it out just fine. Doing it with a router is ok as well except that it takes a lot of fiddling with it to get them set up. Then you want a different spacing or are using different thicknesses of wood, you get to adjust things again.

On the other hand, it ends up being more work than just doing it by hand. It’s not a big deal. It just takes a little practice.

-- Woodworking shouldn't cost a fortune: http://lowbudgetwoodworker.blogspot.com/

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lab7654

252 posts in 936 days


#3 posted 09-07-2012 09:30 PM

Do you mean a blade that is literally shaped like a dovetail? Like a dovetail router bit? If so, I don’t see any reasons why that couldn’t be worked out. The width and weight wouldn’t matter, since most saws can handle a dado set anyway. The metal would have to be really thick to support such big carbide pieces though. The blade wouldn’t have to be very wide in diameter either, since a 10” one would just be overkill and over priced. Good idea really.

-- Tristin King -- When in doubt, sand it.

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OnlyJustME

1562 posts in 1066 days


#4 posted 09-07-2012 09:41 PM

@ lab7654 It wont work that way since the widest part of the dovetail will continue to arch and pass through where you need the narrow as you pass the wood through the blade. Basically you will end up with a notch in your wood the same size as the widest part of the tail.

-- In the end, when your life flashes before your eyes, will you like what you see?

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jmos

681 posts in 1059 days


#5 posted 09-07-2012 09:45 PM

Think that one through lab and you’ll quickly see it can’t work! :-)

A dovetail shaped saw tooth would cut a straight flat kerf the width of the top of the blade, just like a standard carbide tipped blade cuts a smooth kerf the width of the tooth even though its narrower at the saw plate than at the tooth. The fat part of the blade is spinning all around the outer edge of the blade, and that’s going to cut the wood.

The method Loren describes above is the only way I’ve seen to do dovetails on a TS.

I find a bandsaw much easier for cutting dovetails.

-- John

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waho6o9

5088 posts in 1266 days


#6 posted 09-07-2012 10:36 PM

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derosa

1556 posts in 1525 days


#7 posted 09-08-2012 02:23 AM

I saw an ad recently from one of the big blade companies for dovetail blades, I believe there was a left and right side and each had a 7 or 8* tooth to create flat bottoms when set to the correct angle.

-- --Rev. Russ in NY-- A posse ad esse

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lab7654

252 posts in 936 days


#8 posted 09-09-2012 04:18 PM

Ah. I see my error. Oh well, live and learn.

-- Tristin King -- When in doubt, sand it.

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