Sunday! Sunday! Sunday! a Busse Beat Down of Extrordinary Magnitude

[cjpgeyer]

Great vids! Looks like a good time was had by all (excepting 2x4's of course). A nice selection of blades as well. Thanks for sharing.

 

[diceman]

Great job, guys - I really enjoyed watching the videos!

 

[Cobalt]

I will talk about how I do it again here in a few days. I am processing information and taking some caliper measurements try to quantify how thin you can take INFI and Still get a edge that will not collapse and roll under HARD chopping on tough wood. It is possible to go to thin...

Yes, it is possible to go to thin. Cliff noted this in reviews and edge rippling is a direct correlation with any steet. Even tough steels will ripple if the edge is to thin

However it all turned around when I looked at the blade. It swells out to over 2" wide at the max, is 1/4" stock with a full flat grind producing a nice tapered profile. The edge specs out at just over 0.025" and is ground at 15-16 degrees per side - which is exactly as I recently specified the edge on a similar custom. I have tried going thinner than this with many knives, a lot of which claimed really high performance and the edges all rippled readily. The Fehrman was also very sharp, ~125 g on thread, shaved well, sliced and push cut newsprint. None of this nonsense about sharp edges being fragile so we leave ours blunt which is popular for many large knives.
-Cliff

Took it out again today, again went into some knotty wood, one piece about 6" across, bad ring knots. The edge rippled during the primary split. It bent for about 1/2" in length and was dented back from the edge, up to 0.05" thick on the primary grind, ie. twice the edge height.

I stopped then as there is no point in continuing, the bend will just get worse faster as the bend concentrates the stress. It of course is still a useful knife, and its overall functionality isn't severely impaired, however with continued splitting the edge deformity would grow and then tear.

-Cliff

It is a good question, and probably the most critical one to ask is it the geometry or the steel. This knife is ground fairly thin at 0.025" behind the edge, easily enough for chopping and splitting clear wood, but buckled on knotty wood. I would mention though this still wasn't a survivial situation, I was in the back yard. In an actual survival situation the stress would be a lot higher and thus the impacts a lot harder.

The thing that stands out to me is that this is now the fourth time I have seen/heard described this problem with 3V. The first was on a custom from Ed Schott. Great toughness, but the tip bent far too easily given the cross section. Darrel Ralph also described problems with edge rippling in the past. Then I see a edge ripple, and talk to another maker who says they had the same problem, get it really tough it tends to ripple and get it harder and it tends to blow.

My SHBM has an edge which is custom modified, it has a dual bevel, primary edge is 8-10 degrees per side, secondary is 10-12. It can handle chopping knots no problem. I have not split heavy wood with it since I modified it as I was at that time testing to see how low I could go before chopping knots was a problem.

Note as an example of geometry, the Ontario Rtak with a slightly thinner edge than the Extreme Judgement, bent much faster on knots. Edge strength is NOT linear with thickness, even a small increase from 0.020" to 0.025" makes a significant strength difference with little loss in overall cutting ability. Know what you want the blade to do.

-Cliff

 

[Cobalt]

by the way, great job guys. The chopping was good and I kinda figured a well ground CG FBM would rule.

 

[Ken44]

Looks like you had a great time:thumbup:

Thanks alot for the great report's and awesome video's!

I knew they would be great!

 

[Amy-0]

I am glad that you did not chop off fingers or toes:thumbup::thumbup:


Very Sweet Pics and Vids..... Ban... You are the Man:thumbup:


I am so Glad that you all got together

 

[Justabuyer]

So anyway... The Big re-ground FFBM has the edge reset just a SMIDGE thicker. Its all cleaned up. took a few more pics that show the nice edge, the entire blade, the tip and last the Choil to get a Idea of the sweet grind BRK&T did... I think it is perfect now. If somebody has a FBM that will out cut this one on wood... I would love to see it. Hell I will buy it.

 

[Ban]

So anyway... The Big re-ground FFBM has the edge reset just a SMIDGE thicker. Its all cleaned up. took a few more pics that show the nice edge, the entire blade, the tip and last the Choil to get a Idea of the sweet grind BRK&T did... I think it is perfect now. If somebody has a FBM that will out cut this one on wood... I would love to see it. Hell I will buy it.

I think I have an idea on a fatty that may do it. We'll have to see when it comes around

But hell... I am perfectly ok with a skinny FBM.