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How To Make Rabbit Joints

A rabbit joint is where one piece of lumber fits into another piece of lumber. It has much better holding power than a butt joint because there is more surface area for the adhesive. As well, with a butt joint the adhesive is applied to the end grain of one of the pieces of lumber. In the case of the rabbit joint the adhesive is applied to the end grain, but it is also applied to the sides of the grain, making for a much stronger joint.

There are three variations of a rabbit joint.

  1. The basic rabbit joint where one piece of lumber is notched to accept a second piece of lumber, as shown in Figure 1.
  2. basic rabbit joint

    Figure 1 - Basic rabbit joint

  3. The half rabbit joint where the both pieces of lumber are machined to fit into one another, as shown in Figure 2. Half rabbit joints are commonly used at the ends of lumber when making boxes or when fitting the top and bottom shelves to bookcases and cabinets.
  4. half rabbit joint

    Figure 2 - Half rabbit joint

  5. The stopped rabbit joint or as it is sometimes termed the blind rabbit joint, where the dado is not extended the full length of the board, as shown in Figure 3.
  6. blind rabbit joint prior to assembly

    Figure 3 - Blind rabbit joint prior to assembly

    From the end view, it does not appear that a rabbit has been made in the lumber, as shown in Figure 4.

    blind rabbit joint after assembly

    Figure 4 - Blind rabbit joint after assembly

When a rabbit joint is used with vertical and horizontal pieces, such as a bookcase, you get a mechanical transfer of the weight from the horizontal to the vertical pieces, as shown in Figure 5.

rabbit joint load

Figure 5 - Rabbit joint load

The depth of the rabbit joint is usually half of the thickness of the lumber that the dado is made in although there is no hard and fast rule regarding depth. However, unless there is a very compelling reason the dado should never be more than half the thickness of the lumber and not less than a third of the thickness of the lumber.

Rabbit joints can be strengthened and reinforced by the addition of nails or screws through the mating pieces of lumber.

Rabbit joints are easy to make using a dado saw blade, as shown in Figure 6, in a table saw or a router, as shown in Figure 7.

dado saw blade

Figure 6 - Dado saw blade

router

Figure 7 - Router

Additional Woodworking Joinery Information

Butt Joints

Dovetail Joints

Lap Joints

Mortise & Tenon Joints

Through Tenon Joints

Tongue & Groove Joints

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