Edge configuration question?

[marsupial]

I have a question concerning edge profiles in knives.Most knives you see now the edge seems to be very blunt,in this I mean that there is a steeper v grind than say the edge of a Randall or a Blackjack,or a Marbles.Why is this? Are the edges that are more visibly seen tougher or able to withstand more abuse?This seems to me to inhibit slicing and make sharpening harder.Also would not a blade with such a steep v grind eventually dull quicker in that as the edge is worn down it backs itself up to where the v starts? Where as an edge such as those on Randalls you are constantly reprofiling every time you sharpen,in other words you are removing steel but its not backing up to the top of the v.What are the thoughts on this?

 

[Cliff Stamp]

marsupial :

[thicker and more obtuse edges]

Are the edges that are more visibly seen tougher or able to withstand more abuse?

Yes.

This seems to me to inhibit slicing and make sharpening harder.

It does reduce cutting ability, but as long as you can match the angle, you won't have any difficulty in sharpening.

Also would not a blade with such a steep v grind eventually dull quicker in that as the edge is worn down it backs itself up to where the v starts?

Yes.


You can eliminate most of the above problems by putting in a relief grind. That is a grind which is inbetween the angle of the edge and the primary grind. Its purpose is to reduce the wedging action of the thick and obtuse edge, while not giving up too much durability. If you don't need that level of durability then just hog off the entire edge until it has a decent profile.

-Cliff

 

[marsupial]

Thanks Cliff! very informative.