cd

"cyrille de brébisson"

03/02/2005 4:18 PM

3" 5/8 , 3/4" deep Dado: How to cut

Hello,

I am making a workbench (out of 2*4) and I want to cut 3 3"5/8 wide by 3/4"
deep dados to hold the workbench feets...

What advices do you have on how to cut these dadooes?

thanks, cyrille


This topic has 11 replies

Gg

"Geoff"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 8:14 AM

Table saw dado blade set at 3 5/8" width, height 3/4". It's not clear
from your question where the dados are, but clamping pieces together
ensures that the dados are perfectly aligned.

If you don't have a table saw or the boards are unwieldy on your table
saw, you can also use a dado router bit in a router set at 3/4" depth.

b

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 9:00 AM


Geoff wrote:
> Table saw dado blade set at 3 5/8" width, height 3/4".

Now this I have to see - a dado blade set that is 3 5/8" wide - better
yet, I want to see the table saw that will accept it.

I think you made a typo there, Geoff.

Bob

b

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 9:00 AM


Geoff wrote:
> Table saw dado blade set at 3 5/8" width, height 3/4".

Now this I have to see - a dado blade set that is 3 5/8" wide - better
yet, I want to see the table saw that will accept it.

I think you made a typo there, Geoff.

Bob

LH

"Lowell Holmes"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

04/02/2005 2:21 AM


"cyrille de brébisson" <[email protected]> wrote in message
news:[email protected]...
> Hello,
>
> I am making a workbench (out of 2*4) and I want to cut 3 3"5/8 wide by
> 3/4" deep dados to hold the workbench feets...
>
> What advices do you have on how to cut these dadooes?
>
> thanks, cyrille
>

I would do it with a backsaw and a chisel. Two cuts 3 5/8' apart, 3/4" deep
and chisel out the wood between the two cuts. Believe it or not. sometimes
hand tools are much quicker and safer. :-)


Lr

"Leon"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 5:18 PM


"cyrille de brébisson" <[email protected]> wrote in message
news:[email protected]...
> Hello,
>
> I am making a workbench (out of 2*4) and I want to cut 3 3"5/8 wide by
> 3/4" deep dados to hold the workbench feets...
>
> What advices do you have on how to cut these dadooes?
>
> thanks, cyrille

As you have indicated before it is way too hard to cut a dado to 3-5/8"
inches for some one that prefers metric. Convert it to metric first and it
should be easier for you. ;~)

Use a router.

cd

"cyrille de brébisson"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 5:40 PM

Hello,

> Table saw dado blade set at 3 5/8" width, height 3/4". It's not clear
> from your question where the dados are, but clamping pieces together
> ensures that the dados are perfectly aligned.
>
> If you don't have a table saw or the boards are unwieldy on your table
> saw, you can also use a dado router bit in a router set at 3/4" depth.

heu.... I am a little bit flbargasted (spelling?) here....
- the top in which I need to cut the 3 inches and 1/2 dadooes is around 150
lbs, 8 feet long 4inch thick... how will I move that thing on a table saw?
- where in hell can you find a 3 & 1/2 inch thick dadooe blade?
- which table saw do you have that accept such huge amont of material and
huge blades...

to solutions pop to my mind:
- you were being sarcastig (and the joke is on me)
- you pressed the send button too fast (and the joke is on you)...

in all cases, I imagine that most of your wood working friends will have
great fun at your expense over that answer (and a lager) !

Have a great day, Cyrille, Smiling

VB

"Vic Baron"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 4:51 PM

Do you have a dado set that will go 3 5/8" wide? That has to be some sort of
hawg!


My choice would be a router.

"Geoff" <[email protected]> wrote in message
news:[email protected]...
> Table saw dado blade set at 3 5/8" width, height 3/4". It's not clear
> from your question where the dados are, but clamping pieces together
> ensures that the dados are perfectly aligned.
>
> If you don't have a table saw or the boards are unwieldy on your table
> saw, you can also use a dado router bit in a router set at 3/4" depth.
>

Jj

John

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 11:09 AM

Sounds more like you are doing a half lap joint, not a dado, but the
technique is the same.

Setup DADO set to the max width your dado set will go to, then using a
sled or a miter guage and make multiple passes to give you the 3 5/8
in laptop joing you want

OR, use a router and clamp 2 straight edges to the workpiece so that
the when you ride the router against the straight edges, they will
give you the 2 outside dados then hog out the inside
John
On Thu, 03 Feb 2005 16:18:05 GMT, "cyrille de brébisson"
<[email protected]> wrote:

>Hello,
>
>I am making a workbench (out of 2*4) and I want to cut 3 3"5/8 wide by 3/4"
>deep dados to hold the workbench feets...
>
>What advices do you have on how to cut these dadooes?
>
>thanks, cyrille
>

JC

"Joe C."

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 6:45 PM

"Geoff" <[email protected]> wrote in message
news:[email protected]...
> Table saw dado blade set at 3 5/8" width, height 3/4". It's not clear
> from your question where the dados are, but clamping pieces together
> ensures that the dados are perfectly aligned.
>
> If you don't have a table saw or the boards are unwieldy on your table
> saw, you can also use a dado router bit in a router set at 3/4" depth.
>

I'll bet that typo wouldn't have gotten past a moderator.....

Ah well, at least it was an on-topic typo

;-)


JoeC (who's wondering how many horses it would take to spin a 3 5/8" dado
set)

LZ

"Luigi Zanasi"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 1:33 PM

On Thu, 03 Feb 2005 17:18:25 +0000, Leon wrote:
> "cyrille de brébisson" <[email protected]> wrote in message
> news:[email protected]...
>> Hello,
>>
>> I am making a workbench (out of 2*4) and I want to cut 3 3"5/8 wide by
>> 3/4" deep dados to hold the workbench feets...
>>
>> What advices do you have on how to cut these dadooes?
>>
>> thanks, cyrille
>
> As you have indicated before it is way too hard to cut a dado to 3-5/8"
> inches for some one that prefers metric. Convert it to metric first and
> it should be easier for you. ;~)
>
> Use a router.

Like Leon says, router with multiple passes. I would add: Use a
straightedge clamped at a proper distance to guide the router. Start at
the far end.

But why do you need a dado/groove? I assume your legs are a frame or a
trestle, and you want the top of the frame housed (encastre)(1) into the
top. I don't see the need. The top of my workbench is held by one 5" long
5/16" lag bolt in the centre of each trestle/frame, screwed in from
underneath. Plenty strong enough and it allows for differential wood
movement.

(1)How the hell do you get an "accent aigu" on this damn Linux stuff? It's
a French product (Mandrake) so it should be easy, you figure.

--
Luigi
Replace "nonet" with "yukonomics" for real email
www.yukonomics.ca/wooddorking/humour.html
www.yukonomics.ca/wooddorking/antifaq.html

Dd

"Derrick"

in reply to "cyrille de brébisson" on 03/02/2005 4:18 PM

03/02/2005 6:21 PM

Guess you need a router with 50 hp and 1.5" shank to turn that puppy.

Ok seriously you could use the jig technique The Router Workshop guys use to
layout the rectangular cut-out size you need. Using strips of scrap
straight wood tacked to a piece of ply (which will become your template)
define the outside of the cut-out (plus the extra distance needed for the
router guide). Use a spiral bit and template guide in router to cut
template. Attach another couple pieces of wood to define where the corners
of table will butt up against. Now attach template to work piece using
clamps in each corner cutting out the places for the legs to fit. If you
have already got your bench sides attached and they are flush with the top
of the leg, then you have to route channels for the sides to fit into the
top. Just use straight edge and route between the routed leg sockets.

"Vic Baron" <[email protected]> wrote in message
news:[email protected]...
> Do you have a dado set that will go 3 5/8" wide? That has to be some sort
of
> hawg!
>
>
> My choice would be a router.
>
> "Geoff" <[email protected]> wrote in message
> news:[email protected]...
> > Table saw dado blade set at 3 5/8" width, height 3/4". It's not clear
> > from your question where the dados are, but clamping pieces together
> > ensures that the dados are perfectly aligned.
> >
> > If you don't have a table saw or the boards are unwieldy on your table
> > saw, you can also use a dado router bit in a router set at 3/4" depth.
> >
>
>


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