What the heck is with my Spyderfly?

[James Muehlner]

I like my Spyderfly, no doubt. However, when I got, I noticed that it was nicely sharp everywhere except for a small section near the handle. I tried the marker trick, and I sure was removing steel from the edge. However, try as I could, that section stayed dull as mom's old paring knife. The answer came when I looked under a microscope. That section of edge is actually flat. Looking straight down on the edge I see grind lines going sideways, like someone ground the edge not at 40 degrees, but at 180. I have never seen anything like this before. What should I do? I'm worried that it may take a lot of metal away if I reprofile.

 

[James Muehlner]

All right, I reprofiled it, and it's ok now. Sorry to make a fuss, but that really freaked me out!

 

[Esav Benyamin]

I got a slight feeling of what you were looking at this evening, when I went to sharpen a small Dawson fixed blade. Looking down on the edge, I saw dull regions, reflecting the light as if they were that kind of flat -- and I can't remember what I did with the knife to have done that! But mine wasn't as extreme, and a brief session with the Sharpmaker's gray rods took care of it.