|
Most steel isn't truly flat as it comes to us and that may be what you're seeing. Or maybe you're trying to say that in the process of attempting to flatten your tang you seem to be developing a high spot in the middle of the tang. If that's what you mean, the metal may be getting too hot as you grind it and it's warping, especially if it's thin material. Surely that high spot isn't showing up on both sides of the tang, is it? If it is, then check the thickness of the tang down it's whole length - you may be putting too much pressure on the butt end of the tang and grinding it thinner than the middle.
From what I understand, the tang is still straight and of even thickness but the center is just a little thicker. If that's the case, more grinding (careful of the heat) will eventually get rid of it. Tapering the tang would also do the job.
If neither of those ways seems like a fix for your situation, and if the high spot is very slight, then using a liner like the popular red fiber material and some epoxy will take care of it. Not how we'd like it to be but still as solid a handle as you would ever need.
If all of this is way off base, then tell us what metal you are using and the size of the tang area, the grit of your belts, and anything else that could help us find the problem...
|