A box joint is the dovetail's flat-bottomed cousin. Also known as a finger joint, this square joint is a good joint to learn for box making, as it provides corners as strong as the material itself. You will need to set up a 1/4-inch dado blade and measure precisely to get good results. Check your fence setting with the tape measure before each cut to prevent accidental misalignment.
- Skill level:
Things you need
- Wood clamp
- Jointing lumber
- Tape measure
- Table saw
Clamp the two pieces to be joined together with the joint ends flush. Offset one edge of the pieces by 1/4 inch. Use a tape measure to mark the front piece every 1/4 inch.
Remove the arbor nut in the centre of the saw's blade with a wrench and replace the blade with a 1/4-inch stack dado blade. Tighten the nut to lock it in place. Adjust the fence to 1/4 inch from the blade. Locate the blade height adjustment on the side of the saw body and set the height of the blade at 1/4 inch.
Start the saw and run the end of the wood to be jointed over the blade to create a notch in the corner of the offset piece. Stop the blade by turning off the saw. Adjust the fence out from the blade an additional 1/2 inch. Start the blade and run the boards over again. Continue moving the fence out 1/2 inch each time you run the boards over again to create a notched end on each board.
Fit the boards together to form the joint. Tap it lightly with a hammer to seat it properly. Pull the joint apart and add a drop of wood glue in each notch. Fit the joint back together and clamp it in place until the glue is dry.
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