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Best option for cleaning up dados?

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Forum topic by bbasiaga posted 02-01-2016 11:46 PM 1006 views 0 times favorited 27 replies Add to Favorites Watch
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bbasiaga

759 posts in 1463 days


02-01-2016 11:46 PM

I am planning a project that will use dados in several places. To date I have been able to use my small router table to cut dados, but these pieces will be larger and too difficult to use the router table on.

I am thinking I will get a Dado set for the table saw, which in theory means I will also be able to more closely match the Dado to the actual plywood thickness. I have heard that Dado stacks don’t leave as clean a cut as router bits and may require some cleanup.

To clean them up I thought it would be a good excuse to get a rabbit plane/shoulder plane. I see the Veritas and Wood river offer a 1/2” wide and 3/4” model. Lie Nielsen offers a 5/8” and 3/4”.

The plywood I plan to use is nominal 3/4. Would I be better off with the 1/2” plane in case the plywood is a bit thinner than nominal? Maybe I am over thinking it. Was originally set on the 3/4” but then started to wonder what the overall most useful size would be.

Thanks

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.


27 replies so far

View Redoak49's profile

Redoak49

1964 posts in 1456 days


#1 posted 02-01-2016 11:50 PM

The 3/4” is too wide.

I have the Veritas medium shoulder plane and love it. Works great for what you are doing.

View MadMark's profile

MadMark

978 posts in 921 days


#2 posted 02-02-2016 12:01 AM

3/4” ply is often 23/32. The router will gve the best results. A hand router with a guide bar is in order.

Dado blades tend to be rough on plywood. Tape the edges to reduce tearout.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

View bbasiaga's profile

bbasiaga

759 posts in 1463 days


#3 posted 02-02-2016 12:22 AM

Im actually going to dado in to hardwood to accept a piece of plywood. So if the ply is 23/32, im thinking the 3/4 (24/32)” plane is too wide…especially considering the blade is wider than the body. Right?

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View jmartel's profile

jmartel

6579 posts in 1618 days


#4 posted 02-02-2016 12:44 AM

For this application, I would think that a router plane would be better suited for it. Much easier to accurately control depth as well. Plus, it’s a bit cheaper.

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

View TheFridge's profile

TheFridge

5765 posts in 954 days


#5 posted 02-02-2016 12:46 AM

I’d go with a router plane. Way more versatile.

Just let me ask this question: whether it be edge handing or face frames will the joint be seen?

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

View paratrooper34's profile

paratrooper34

892 posts in 2420 days


#6 posted 02-02-2016 12:47 AM

Router Plane is best bet for cleaning up dados. They have depth adjusters that will make them all uniform; something you cannot do with a shoulder plane.

-- Mike

View shampeon's profile

shampeon

1719 posts in 1651 days


#7 posted 02-02-2016 12:51 AM

The Paul Sellers “poor man’s router plane” is a chisel driven through a block of wood. But a router plane works well, as does a shoulder plane.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View bbasiaga's profile

bbasiaga

759 posts in 1463 days


#8 posted 02-02-2016 12:53 AM

Good feedback so far. I will have to look in to router planes.

To answer the question, the end of the dado will not be seen in this application. It will be behind a face frame. I will have a rabbet on the ends of that face frame with a panel setting in it that will be seen.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View hotbyte's profile

hotbyte

844 posts in 2443 days


#9 posted 02-02-2016 01:00 AM

One of these? Exact width do jig

Also like idea of router plane.

View TheFridge's profile

TheFridge

5765 posts in 954 days


#10 posted 02-02-2016 01:01 AM

Router planes are ridiculously useful tools.

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

View gfadvm's profile

gfadvm

14940 posts in 2158 days


#11 posted 02-02-2016 01:08 AM

Dados cut with my Freud Box Cutter Set require no clean up at all.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View jmartel's profile

jmartel

6579 posts in 1618 days


#12 posted 02-02-2016 01:10 AM

I’ve got the veritas router plane, and it is fantastic. Also by far the best way I’ve tried so far to cut out mortises for hinges. I’m not as good with just a chisel for getting a flat bottom.

http://www.leevalley.com/US/Wood/page.aspx?p=52609&cat=1,41182,48945&ap=1

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

View knotscott's profile

knotscott

7225 posts in 2843 days


#13 posted 02-02-2016 01:30 AM

If you get one of the top dado sets, you really shouldn’t have enough cleanup to really worry about. The best sets generally leave really smooth bottoms, but will have very slight bat ears on each edge left by the beveled teeth of the outside cutters…they’re often barely noticeable, and many people don’t even know they’re there. My guess is it won’t be an issue if you go with a set like the Infinity Dadonator, Forrest Dado King, Ridge Carbide Dado Master, Freud SD508….those sets will run $200+. The DeWalt/Delta 7670 set isn’t quite to that level, but is better than the other $100 sets I know of, and may also be just fine without additional cleanup…that one runs in the $120 range.

Here’s a look at a bad cut from a cheapie set like HF set:

Here are examples from a better set like the Oshlun or Freud 208 (< $100):

Here’s a cut from the DW7670 set (I don’t have an example from an Infinity, Freud 508, Forrest, or Ridge Carbide, but IME their cuts are even better.)

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

View bbasiaga's profile

bbasiaga

759 posts in 1463 days


#14 posted 02-02-2016 03:51 AM

Wow, those are great pics. That Dewalt set seems like a pretty good middleground. I started reading up on outer planes. Except for the end grain (is it the cheek or the shoulder) of tenons, it seems like it could do anything I was expecting to do with the shoulder plane, and a whole lot more. Still need to do some digging though. The Veritas and the Lie Nielsen both seem nice.

So did someone say you can’t or shouldn’t cut dados in to plywood with a dado blade?

-Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View MadMark's profile

MadMark

978 posts in 921 days


#15 posted 02-02-2016 03:58 AM

Plywood chips no matter what you cut it with. Tape the edges of the cut before final cut to minimize the tearout. Test on scrap 1st.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

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