45 degree domino joint, but more awkward than needs to be, advise pls.

[Mellowfellow]

Hi all,

I’m working on a room divider that’s mainly made out of 30x50mm oak. I’m using 2 6x40mm dominoes for each joint to help with racking instead of 1 10mm domino.

I’m at some crossroads to do with 45 degree joint. I’d like to use 2 6x40mm dominoes and not sure how to make the tool do the thing I want.  Advice would be appreciated. Might just go for 10mm in the end. Anyways, see the picture.

Thanks!

 

[Crazyraceguy]

With a DF500, you are not going to be able to do that in the orientation pictured. It does not have enough travel (depth of cut). The DF700 could do it that way, but there is an alternative.
You can stick with the DF500 and move the Dominos to be perpendicular to the joint. You may still have to shorten them a little, depending on the thickness of that material.
This assembly would work much better if the boards were cut into a miter, rather than overlapping though.

 

[Packard]

Could you make two 22.5 degree cuts?  I will have to sketch that ou to see how it looks.

You could through pin with a couple of dowels.  Match or contrast the dowels depending on the look you want.

Or two 7mm Confirmats set below the surface and then plugged.

The Confirmats would solve the strength and clamping issues.  Matching grain plugs should be nearly invisible.  Confirmats have impressive racking and pull-out strength and a pair might very well outperform the dominoes.

 

[ChuckM]

Not sure what your actual build is and what its structural needs are (yours will be an endgrain to face grain joinery), based on what I understand from your picture, with careful positioning, a single 10x50 domino might be able to fit into the joint:

[attachimg=1]

Two 6x40 tenons (stack) are also possible.

All mortises are drilled perpendicularly to the mating surfaces.

Whenever I'm not sure, I use scraps to verify my settings/propositions.

 

[derekcohen]

The Domino is not suited for this joint, even if you could make the cut. The joinery of choice is a bridle joint. Easy to saw and very strong.

Regards from Perth

Derek

 

[4nthony]

The Domino is not suited for this joint, even if you could make the cut. The joinery of choice is a bridle joint. Easy to saw and very strong.

Regards from Perth

Derek

[thumbs up] [not worthy]

 

[jsabados]

The Domino is not suited for this joint, even if you could make the cut. The joinery of choice is a bridle joint. Easy to saw and very strong.

Regards from Perth

Derek

100% agree!  Sometimes it's faster, easier, and smarter to not use a Festool!

 

[Svar]

[attachimg=1]

 

[ChuckM]

By "room divider," I really don't know enough about the project and its joinery requirements, and hence can't say whether or not the loose tenon joinery is suitable.

If it's suitable, the DF500 would be the tool of choice...because the OP is a Domino Joiner owner, and Domino Joiner die-hards know they'll grab every chance to use their DJs! [tongue]

 

[Packard]

[attachimg=1]

I suggested 22.5 degree cuts and dowels (post #2). 

I still think dowels will allow more breathing room than dominoes.

I also don’t know the strength requirements of this joint.  It looks like a trim piece which has minimal requirements. But a recommendation without strength requirements is always risky.

So, I think dowels are a simpler option, but they are not a recommendation until we learn more about the application.