Festool Domino Machine Instruction Manual - page 18

In the example shown on this page the 

R&S components are Purple Heart while 

the panels are Maple Burl.  

If the joint is a stressed joint, such as the 

corners of a door, then I like to put an 

8mm Domino M&T 

inside

 the 10 x 10mm 

tongue and groove cut into the rail and 

stile pieces as shown above.  The 10mm 

tongue is cut into the rail piece and the 10 

x 10mm groove cut into the stile piece.  

The 8mm Domino mortise is cut into the 

middle of the groove and the middle of 

the tongue (top photo).

The Domino M&T not only strengthens 

this joint, it also automatically aligns it as 

well.  And, by having glue on both sides 

of the trapped narrow 1mm tongue wall, 

the joint is incredibly strong.

In the photo left my finger points to the 

joint going together and above is a photo 

of a panel being inserted into a three 

panel R&S assembly that was made this 

way.  

Below is a cut away of a door done 

this way to show how the precise po-

sitioning the Domino machine pro-

vides can quickly and easily cut what 

many would consider a most difficult 

joint

 - 

three 8mm M&Ts cut inside 

three 10mm tongue and groove joints, 

all perfectly aligned!