Incra IBox Jig - Page 2 - Router Forums
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post #11 of 12 (permalink) Old 05-19-2019, 12:19 PM
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I think your joints turned out good, until you cut the groove for the box bottom and it broke out the end. You needed to cut the slot with a small router bit as a stopped slot to not cut out through the box joint at each end.

Another way is to get one of the small diameter box slotting bits from Lee Valley. With these bits, you dry assemble the 4 sides of the box and using your router table with one of these bits set for the distance up from the box bottom edge that you want to place the bottom panel, you just run the box sides around the bit to cut the slot all the way around. The small diameter of the bit lets it cut into the box corner. All you need to do then is round the corners of the bottom panel to fit and you will have a completely hidden corner cut. The small diameter of these slotting bits is what makes this work. Other larger diameter slotting bits will stop cutting before reaching the box corner.

Box-Slotting Bits - Lee Valley Tools


Charley

Central North Carolina
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post #12 of 12 (permalink) Old 09-05-2019, 11:09 PM
BCR
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Not sure why you had long setup time. I had one of these jigs for about a year, and it is by far the easiest way to setup and cut box joints. I sold mine just a few weeks ago, as I have found less use for it. As well I have the full Incra set, for more than just box joints. The only reason a joint would come out bad, is by user error. It really is foolproof. Perhaps the knob to lock it in place was not fully disengaged when you went to set up for second and so on cuts. Or if its from bad cut, then that would not be from the jig, rather your blade (or bit).
It really is foolproof, even if you wanted variable spacing, it is by far the easiest jig I have ever used.

The full Incra LS positioner, is a different story, it does take some setup time; but after it is setup it also is very effective at being incredibly accurate.
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