The problem with the typical box joint jig is that most do not allow for
different sized pins and slots. Basically if you are making box joint
drawers to fit a cabinet or chest you have to design the chest around
the sizes that the jig affords you.
The iBOX and IIRC the WoodSmith jigs allow you to have different sized
pins and slots on the same piece of wood with out changing the sidth of
the cutter. This affords you the ability to make the drawer after
building the cabinet opening. You can have any width box joint joint.
If you are using 1/4" pins and slots the jig allows your joint to be 4
3/16" wide or 6 7/8 with full pins and slots on the ends.
Think about it. All the slots are going to be the same unless you
change blades. You can change the width of the pins with the jig, but
where would the wider pins go? Surely not in the same size slot.
The nice thing about the woodsmith is that you can infinitely adjust
the pin width so that they are exactly the width of the slot to get a
snug fit all the way down. You are probably too old to appreciate a
You have to think outside the box. I have the iBox box joint jig. The
very first joint I tried out is with the different irregular width
joint. And to be contrary to your comment, the slots are not all the
same even though the cutter is the same width.
And what you don't realize about the WoodSmith jig is that it will also
allow different sized pins and slots on the same joint with the same
sized cutter. This is assuming you are using the same Woodsmith jig
that operates like the iBox jig.
Look here for an example of different sized pins and slots made with the
same sized cutter.
Scroll down to the video but look at the joints on the video before
clicking the play button.
Actually it might be able to be don on most any jig but as you and I
have the jigs that will let you use any size cutter that adds to it's
In a nut shell you do not cut all the slots from one end to the other.
You cut "almost" half way from on end of the board then reverse and
start from the other side. When you end up near the middle you have a
wider pin and or slot, depending on which piece you are working on.
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