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Best grind angle for a .25 thick knife to be a slicer take hard use

K

knife chop

Joined
Feb 11, 2014
Messages
816
I'm thinking of doing a FFG on my BK2, but what would be a good grind angle when i do the grinding? i want it to be a slicer but can tackle some light batoning and chopping.
 
knife chop said:
I'm thinking of doing a FFG on my BK2, but what would be a good grind angle when i do the grinding? i want it to be a slicer but can tackle some light batoning and chopping.
Click to expand...

Ignore "angle", that is the wrong way to think about it.

Instead, think about how strong you want the edge to be, and how deep you want it to cut. Steel strength is primarily determined by the thickness of the material absorbing the stress. Cutting performance (penetration) is determined by the thinness of the material at the edge. In my experience (and others here can disagree or lend support), an edge sharpened to 15-20dps with a thickness 0.020-0.030 at the bevel shoulder can sustain a LOT of stress such as may occur during chopping and batoning. I recommend that you grind the blade at whatever angle achieves that edge-thickness... Or just get a different knife ;) Use it hard, and if you feel that the cutting performance isn't good enough and durability is more than sufficient, lower the edge thickness.
 
^ That's a good call.

I will say that I back-beveled my Esee Junglas at 11 dps (it's 1095) and then microbeveled at 20 dps and it help up more than fine! Not sure on the thickness at the shoulder transition point but it was pretty thick.
 
I'd go for 15 dps and if that fails apply a more obtuse microbevel. Keep adjusting the microbevel until the edge can take the work you're doing with it.
 
We're talking blade grind here right? Since you said FFG. I'd suggest trying for 5 degrees. The grind that's on there will probably already be close to that, and you'll have a ton of metal to remove even at that angle.
 
knife chop said:
I'm thinking of doing a FFG on my BK2, but what would be a good grind angle when i do the grinding? i want it to be a slicer but can tackle some light batoning and chopping.
Click to expand...

Jason has the perfect video for u right here: https://www.youtube.com/watch?v=lx4odmy3zc4

I guess that is what u want. Once u have thinned the blade to your liking/needs, u can adjust the "convexivity"/microbevel as needed.
 
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knife chop said:
I'm thinking of doing a FFG on my BK2, but what would be a good grind angle when i do the grinding? i want it to be a slicer but can tackle some light batoning and chopping.
Click to expand...

I would consider convexing it way down, grind the shoulder/flat transition right into the primary grind. Finish it off at about 28-30* inclusive. Doing a FFG on one of those will require power tools. Convexing it is going to be a bear of a job too, but a lot easier by comparison and it will still be a huge improvement.
 
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