Join Date: Oct 2007
Location: corvallis, Oregon
Weird. I just dovetailed 13 drawers this morning, using BB and had 4 tear-outs, where I didn't do the scoring pass deeply enough. My tear-outs were about 1/8" wide and maybe an inch long. Glued them back in, no problem.
So I have another suggestion. Is your reverse pass deep enough? On my Omnijig, if I set it up so that when I assemble the drawers, the joints are flush, then I cannot make the first pass deeply enough to avoid the tear-out, because the termplate is too far to the front edge of the wood. I have to set it up so that when I assemble my drawer tightly, the sides will push in more than the width of the front and back, by either 1/32" or 1/16". I have to take that into account when I calculate the finished drawer sizes, and I have to pass the drawers through the trim bit on the router table after glue-ups. But it virtually eliminates tear-out. As I had stated in my previous post, ideally, you want to cut through the first layer of ply on your initial pass.