Justabuyer's FFBM -vs- 2x4s

Tyrkon Lawson said:
Ban had asked about the angle variable as well. I definitely notice that my chops go much deeper at certain angles. I do not know if it do to the grain of the wood or some other factor but I definitely notice it. I will try to isolate this in my next series of tests. :thumbup:
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I think it is a combination of energy transfer and following the grain. At certain angles the blade just seems to follow the grain and dig really deep. Also, when the 2x4 is planted down at a optimal angle, the strike appears to transfer all of the energy directly onto the 2X4 in a linear angle towards the ground. Well at least that is what I think after trying chopping with the 2x4 held at an angle. Chopping 2X4s perpendicular to the knife usually yields in much more shallow cuts.

BTW, JABs Convexed FFBM was already a chopping monster when I tried it out a while back. I can only imagine it getting better after he has refined the edge some more.
 
norcalblacktail said:
Great vids Tyrkon. I like the new host site. Fast loading.

I think with a different 2x4 setup you could get through in less than six no problem. Just need something with some stability to hold the 2x4 in whatever position you want to chop it in. I am going to be building a chopping setup for the next NorCal Busse get together.
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Yes Do It! I would love to try it out :thumbup:
 
norcalblacktail said:
Great vids Tyrkon. I like the new host site. Fast loading.

I think with a different 2x4 setup you could get through in less than six no problem. Just need something with some stability to hold the 2x4 in whatever position you want to chop it in. I am going to be building a chopping setup for the next NorCal Busse get together.
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Good advice. I'll see if I can't google some plans for a good chopping set up. :thumbup:
 
Perhaps Noss4 can answer this some time in the future but I am curious about the trade off of blade strength -vs- increased chopping ability.

For example: If the convexed/thinned FFBM I am testing here out chops the CG FFBM by let's say 3 chops does that out weigh any extra strength the CG FFBM may have over it (if any)? Maybe. Maybe not. I guess it all depends on what the actual differences are and what your intended purpose is.

I know a lot of people here take the stance that a knife is for cutting and should not be used for other chores such as prying, batonning, etc... But let's face it, knives have evolved, many are made to meet multiple needs, and users today have different wants and needs.

Just something to think about. Having said that, unless the heat treat was somehow compromised in this convexed FFBM, I can not imagine it not being strong enough for any crazy chore I might throw at it.
 
Great thread and great chopping Tyrkon.

I just reprofiled my FFBM to a convex edge and it's now ready to do battle. I will need to go get some 2x4 and gives this a go for sure.
 
RoyalM said:
Great thread and great chopping Tyrkon.

I just reprofiled my FFBM to a convex edge and it's now ready to do battle. I will need to go get some 2x4 and gives this a go for sure.
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2x4s every where need be afraid.VERY AFRAID! :p:D:thumbup:
 
I doubt that strength will be an issue for thinned FFBM's and I doubt we will ever hear of a CG FBM breaking. (outside of a NOS sledge hammer vice, cutting steel type situation). I bet you could take a BM down to .20 or even thinner and never have a problem at all.
 
Tyrkon Lawson said:
I am off to get some more 2x4s for a bit more testing tonight. Vids should be up tonight as well. ;)
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I predict you can get a 2x4 in half with four clean cuts but they will have to be damn near perfect hits. I know you can do it. I am going to try to see if this knife will beat a BM on a 2x4 chop:

Capture_00166.jpg


I think it will give it a run for the money.
 
Nice. 4 chops the first time 3 the second. Now try and do that with a 4x4 :D

Thanks for the the videos. :)
 
Justabuyer said:
I predict you can get a 2x4 in half with four clean cuts but they will have to be damn near perfect hits. I know you can do it. I am going to try to see if this knife will beat a BM on a 2x4 chop:

Capture_00166.jpg


I think it will give it a run for the money.
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The Sebbie??? THAT is something I gotta see! ;) :D
 
Justabuyer said:
I predict you can get a 2x4 in half with four clean cuts but they will have to be damn near perfect hits. I know you can do it. I am going to try to see if this knife will beat a BM on a 2x4 chop:

Capture_00166.jpg


I think it will give it a run for the money.
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That is a cool looking knife. How thick is that thing? It better be really hefty in order to ofset its length/leverage disadvantage. I would probably still put money on a convexed FFBM.
 
All right. This sucks. I tore open my hand yesterda and it is just getting in the way too much to do anything serious with my right. I tried anyway, tore it open more, and although I could just power through it I know it would bother me enough not to do 100% and thus screw things up. So here is a quick clip comparing 10 chops with my CG FFBM and JAB's convexed FFBM using my left. And I was running low on wood after trying some other things. Sorry guys.



Both are chopping machines and I could easily eat a 2x4 up in less than 10 chops using my right. Before I hurt my hand I definitely noticed that the convexed seemed to bind less.

Great mod Justabuyer.
 
Great Vids man. Seems like based on your commentary you are developing some conclusions based on YOUR Experience.

The convexed blade may have a slight edge in chopping but not a great big improvement. But noticeable?

The convexed blade binds less by a good margin.


I would add from MY experience that the convex edge is MUCH easier to maintain.

That given the nature of convex sharpening th edge tends to get thinner and not thicker with time, thus performance improves with repeated touch up. The extact opposite of the traditional V-bevel.

Reasonable conclusions?

Shall we all chip in a get Jerry a new slack belt Grinder?:D
 
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