Chisel-ground edge

pyton357ru

pyton357ru

Joined
Aug 26, 2002
Messages
362
What are the advantages/disadvantages of chisel ground edge?
I came across it at Emerson's site, and they seemd to think is as a strong "pro" for buying their knives...
Thanks Beforehand!
 
Pro : Only one side to sharpen, so easy to maintain.
Con : Hard to do precision cut. If you try to push cut a paper
you will notice the blade will tend to go to the right.


I used to hate chisel ground. But now I kind a like it.
 
a chisel ground blade does make a durable edge, but if you wanted too, well...we'll say cut a round whole in a watermelon. It would be hard to control the blade as the "chisel" would tend to want to go its own way. Ive owned a few chisel ground blades, and it it a strong durable edge, but you sacrifice other things when choosing it. Just my opinion.

hope this helps
 
Torah :

Only one side to sharpen, so easy to maintain.
Click to expand...

You can do the same thing with a dual ground edge. In fact this is what you will do if you use the burr method.

Its only advantage is that it is easy to turn in materials. Its disadvantages are many including lower durability and loss of control in cutting due to the uneven grind.

It often gets attributed a high duability or a high cutting ability, but this isn't due to the inherent ability of the profile, but simply either that the edge is left thick and/or obtuse, or the opposite.

-Cliff
 
Joe Talmadge may be the one who first started using that term, he definately made it popular. He describes it fully in his sharpening FAQ which is available here on Bladeforums as well as all over the net. Essentially you sharpen the edge fully on one side until a burr forms, which is a slight ridge of steel which has folded over in the other direction from the pressure of honing, you can feel it with your thumb pad readily stroking perpendicular to the edge. You then flip the blade over and remove the burr and clean up the other side which takes very few passes as you already did most of the work on the other side. Check the FAQ for a more complete description and lots of other valuable information aside. The rest of his knife FAQ's are essential reading as well.

-Cliff
 
A chisel grind is weaker than a symmetrical grind. On hard impacts the edge will tend to bend towards the unbeveled side. The grind works best when slicing or shaving material off the side or end of something. It cuts comparitively straight when one side is supported and the other side of the cut is weak. Think of whittling. The shavings don't push very hard as you cut so the tendency of the asymmetric blade to dive into the material makes reduces the tendency of the blade to skate out of your cut.
 
Cliff, you're forgetting to mention the main "advantage" or feature and that is sharpness. A chisel ground blade has a very acute bevel since it uses only half the bevel of a regular edge. Yes, they are less durable and hard to cut (except in straight slicing where they shine) but they are sharper. Take care.
 
Knife Outlet :

A chisel ground blade has a very acute bevel since it uses only half the bevel of a regular edge.
Click to expand...

There is nothing stopping you from sharpening a regular bevel to the same included angle. It will then cut as well, and be more durable and more precise as the forces are evenly distributed.

-Cliff
 
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