Best grind for a khukri

What is the intended use?
Usuallu it is convex though I own a genuine Gurkha Kukri from about 100 years ago which shows a V grind.
 
I am no expert, but mine is used for wood cutting and I use a V grind with a wide angle bevel on it. 1095 steel.
 
I put a wide v-grind on mine. Seems to cut well and seems to stay sharp. I whacked off 7' of tree limbs off of a pine tree (it had a 100% canopy) with mine. Up to 3" limbs. Still sharp enough to use after that.

Good enough for me in the sharpness department.

Also nice because it's easy to re-do the edge with a V-grind rather that having to hand sharpen to get a convex. Convex might be better at edge retention, but IMHO convex sucks to sharpen.
 
It really doesn't matter much if it's convex or flat as long as the overall geometry is appropriate for cutting performance (e.g. thin.)
 
FortyTwoBlades said:
It really doesn't matter much if it's convex or flat as long as the overall geometry is appropriate for cutting performance (e.g. thin.)
Click to expand...

IMO convex isn't so much for performance on the cut, it's performance on retrieving the blade out of a log.;)
 
That completely depends on the overall geometry of the blade and the depth of the cut. It's not as simple as "convex vs. flat" because you could easily have a convex blade that gets stuck easily or a flat one that doesn't. Overpenetration is overpenetration. If a blade is sticking you're probably driving it in too deeply and should either use a lighter blow or a thicker geometry (depending on the intended target variety--it depends on if splitting/spreading forces are desirable for your tasks or not.) But at any rate, it's a pretty minimal consideration compared to other factors.
 
For a bushwacker I like a double bevel. Flat ground primary with a convex secondary. Edge retention has nothing to do with the grind, it is dependent on the heat treat. For a blade that will take a LOT of abuse you don't really want anything over a 56rc, so edge retention is not going to be amazing. When I do a bushwacker I always recommend a differential temper. 56rc on the edge and a spring temper through the spine.

Though one I did the guy opted for a 60rc edge and spring temper spine... I see him semi regularly and every time I do he tells me how much he loves the blade and that he still has only stropped the edge. So as long as you don't hit a rock going for a hard edge is ok too.

Good luck with your new blade, whatever you decide.
 
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