Absolutely no problem as long as your mortises are milled close to the inside edges of the joint. How close? See the sample photo I took. The stock was 25mm thick (1" or so); so yours should be at least something like that. Place an actual domino on the side of the mitred edge at 15mm mark, and you can see how close you want the mortises milled.

Practice it on some  3/4" scraps to verify your machine is properly set.

Assuming you are boring with the 15mm setting, the center of the mortise will be 16mm (the bit swings so 15 on the edges, 16 in the middle).

The cut edge of the 45º miter of a 3/4" board is 1.06" (27mm). 5mm thick Dominos means you'll want the center of the Domino at most 7.5mm from the inside edge of the joint. Remember that the height setting gauge is only accurate for the fence tipped down 90º. At 45º, the height gauge's "10mm" setting is really 13.5mm. That 3.5mm difference is regardless of the height setting (it has to do with where the hinge is located... 5mm in from the milled face). So you'd need a height setting of 4mm, which the fence doesn't do. You'll want a shim board taped to the fence face to compensate.

Sorry for all the crazy numbers 

Made a few mitre cuts in the shop and then used the DJ with the standard mitre setting & 5x30mm domino, and here are the results. Adam - Make sure the fence bottoms out when you set the fence to 45* (4th pic).

P.S. Not a promo, but all mitres were cut on the Kapex. Previously with my Dewalt, the success rate with dead-on mitres was unpredictable. 

@StevoWevo   this looks interesting. I’d like to see more/better pictures if you have them.

I thought you guys would be chuckling behind your keyboards when I posted it 😂 let me see i

I dont recall if i used 4mm or 5mm in this project

I just did 9 shop drawers from 18mm ply stock (measured at 17.8mm) using 5mm dominos and mitres.

You absolutely can do this but the mortise needs to be as close to the inside edge as you can get - the lowest you can get the fence. Even then there isn’t much meat left at the back. I had glue leak through the back of a couple of them at glue up.

I used the 45 degree fence setting and it worked fine.

Not important for my shop drawers but for furniture I wouldn’t try this in anything less than 19mm.


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Thanks Chuck yes next time around I would do that too. Either shim the rail or the face plate and trim down the dominos.


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