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Make An Accurate Box Joint Jig, Simple & Fast

The box joint, also known as a finger joint, is probably the most popular and widely used joint for drawer construction and box making. Aesthetically it has a very nice look, and structurally it’s very strong. Here we’ll show you a method that is fast, simple, and accurate. And best of all it costs next to nothing to make.

Specific Tools Used

Mitutoyo Dial Calipers
Forrest Woodworker Flat Top Table Saw Blade

9 thoughts on “Make An Accurate Box Joint Jig, Simple & Fast

  1. I’m grateful for your informative videos. I’m making a finger jointed pine cabinet for a guitar amplifier. You mentioned that you prefer 0.005″-0.006″ larger openings for your drawers made of plywood. Would you choose a similar tolerance for solid pine?

    I also appreciate your comment about having a single saw. Every time I reassemble my dado (with the same shims), it comes out a slightly different width because of the way the shims lay in the threads. It does suck!

    1. Hi Chris, For solid wood I use .003-.004 harder wood .003 and softer wood .004. It’s best to make a test cut to make sure. Hope this helps.

  2. My table saw won’t take a dado set.
    So I’m going to make a jig for my router table.
    Do you have any tips/suggestions that would help in the making of an acurate jig?

  3. Why do you use a 3/8″ or .375 dado? a 4″ drawer side divided by .375 = 10.666 But you say and it appears to be perfect across the 4″ rather than having a smaller 2/3 piece at the end.

    1. 3/8 dado is actually .365 and the size of the fingers I make smaller which is around .360 If you add those up It will only be off by .01. I try to keep the video short and to the point and sometimes I have to make a judgement on editing. I hope this helps. Appreciate the comment and for watching.

  4. thanks for your training.
    Been away from wood working for 40 years..
    thanks for taking the time to teach the techniques that make all the difference

    Trying some finger joints tonight.

  5. Are you using the Forest Flat bottom box joint set or are you using multiple Forest Woodworker II #1 grind 10 inch blades?

    1. I use the Forrest WW II #1 grind which is the same as the box joint blade. For making 3/8 box joint I use their 8″ dado set. Hope this helps.

      1. great job

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