Line in blade?

[Rick Otts]

I am grinding this blank and get to 120 grit when I notice a line in the blade that runs N and S and I am thinking how could I have done that it's smooth so it don't look like I did it on a pass.I reground the blank and it's still there any ideas a pic won't help you can only feel it I would say 1/32 wide.

 

[Ty Adams]

Is it about 2" from the plunge lines?

 

[bladegrinder]

It sounds like it might be an inclusion, what kind of steel is it? I was finding a lot of weird stuff going on with 440-C about 7-8 years ago and stopped using it for anything, although even with CPM-154 which is supposed to be super clean I've found what appeared to be scratches, usually just one, in the blade that I knew it was nothing I did. after a LOT of hand sanding I was able to make it go away. these scratches were parallel to the blade though.

 

[Rick Otts]

1084 can't understand why it would be where it is going from edge to spine.I reground blade and it's still there.

 

[Ty Adams]

If you pause at the plunge lines with to much pressure you will get a line on the opposite side of the blade. In the picture I'm against the plug with the platen. On the other side is where the line will be.

 

[Rick Otts]

I guess that is wat I did beacuse I did it on the 2nd knife also.

 

[bladegrinder]

The dreaded 2" gouge.

 

[Rick Otts]

Well I will have too blend it in.

 

[Rick Otts]

Well all fixed thanx for the help.