Festool Domino DF 500 User Manual download pdf (Page 15)

Making Miter Box Joints

Generally miter box joints are fairly weak because the joint

is predominately endgrain to endgrain. Tenons significantly

increase the strength of the joint and make it easier to

assemble and clamp the pieces.

Instruction Manual 15

Construction Tips

► For thinner materials, keep the mortise close to the

inside corner. This minimizes the chances for boring all

the way through the workpiece.

► For very thin materials, it may be necessary to shorten

the Domino tenon length as described on page 19.

► For thicker materials, stacked mortises can be used as

shown in the picture to the right.

Setup and Machining

1. Tilt the fence to the appropriate angle. (Refer to the

table on page 7 for miter angles for multi-sided boxes.)

2. Lower the fence to the desired height. Note that the

mortise should be close to the inside corner to avoid

penetrating through the workpiece.

Tip: Before milling the mortise, double check your

depth settings to ensure you don’t cut all the way

through.

3. Plunge the joiner as shown below.

► The stacked mortises are used for thicker stock.

► Grasp the joiner by the auxiliary handle for best

control.

Making Lock Tenon Joints

A locked tenon joint is any type of joint with two or more

tenons at opposing angles. Once the opposing tenon(s)

are inserted, the joint cannot be disassembled. With the

exception of the Three-way Locked Miter Joint (page 18)

at least one of the tenons must be exposed so it can be

inserted after the joint is assembled. This is referred to as

the Locking Tenon.

There are many variations of a locked tenon joint, but the

simplest involve a mitered corner in a box or flat frame.

The miter angle provides an easy reference for the two

tenon angles.

In the example shown to the right, a standard miter joint

is constructed using a large Domino tenon for strength in

the main joint. The locking tenon is a 5mm x 30mm

Domino tenon.

The mortise for the locking tenon is milled with the joiner’s

plunge depth set to 28mm. This mortise is typically milled

after the joint is assembled, but it is possible to mill the

mortise in each piece separately.

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Festool Domino DF 500 User Manual Page 15

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