Edge geometry and amazing cutting ability

johnniet

johnniet

Gold Member
Joined
Jul 12, 1999
Messages
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Did any of the Busse A2 knives have the same half-flat, half-convex edge as the current Basics do?

Reason I'm asking: as some of you know, I and many other people were shocked by Mike Turber's rope-cutting tests: 9" basic cut 2771 times through the same rope and they ran out of rope...the Trailmaster, certainly a respected knife, was...don't remember now...maybe 120 times or so before dulling?

So I am wondering how much of that has to do with the funky edge geometry. If you ground Carbon V, or A2 or D2 or VG10 the same way the Basics are ground, could you get maybe 500 or 1000 cuts of rope? Something somewhat comparable to the results the Basic got? Or is the difference all in the steel?
 
Where did Mike do 120 cuts with the Trailmaster? As far as I know he didn't compare the two directly in this regard.

As for the geometry, the convex part of the bevel will strengthen the edge relative to a dual v-grind. However people have been putting full convex bevels on blades for a long time which are even stronger.

-Cliff
 
None of the A-2 knives have had the asymmetrical edge...convex YES...asymmetrical NO.

Now, Jerry might let me have some old inventory of a particular model, made from A-2, where he will apply the asymmetrical edge, but to date and to my understanding, it has not been done to an A-2 knife, EVER.


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Cliff
Heres a link to the page that I believe johnniet was talking about above. http://www.bladeforums.com/magazine/trial/csvsbusse-1.html
On the 6th page is the rope section of the test. Quite detailed test overall.

By the way, I think your reviews are great and always check them out at your webpage. They are really enjoyable and extremely informative. Keep on writing 'em and I'll keep reading 'em.

Thanks

JD
 
Hmm--Cliff has made an important correction.

The number 120 in my memory(actually 122) came from the 7" test (Recon Scout), not the 9" test (Trailmaster).

More worryingly, it was NOT the number of rope cuts, but the number of inches of cardboard cut before starting to snag. The Recon Scout cut 122 inches.

The Busse Basic 7, on the other hand, cut 600 inches of cardboard and still didn't snag -- but Mike got tired of cutting cardboard.

<a href= "http://www.bladeforums.com/tests/Page-5.html">
7" Cardboard test
</a>

In the 9" knife test, on the rope cutting, the deciding factor was hand fatigue due to the Trailmaster's unergonomic grip. This was at about 100 cuts; up to that point they were both doing quite well.

<a href= "http://www.bladeforums.com/magazine/trial/csvsbusse-6.html">9" rope test
</a>

[This message has been edited by johnniet (edited 03-15-2000).]
 
John, yes it is easy to see why fatigue/discomfort would be a limiting factor given the Trailmasters grip. I think R. J. Martin made a comment in a recent thread that is relevant here when he said (paraphrase) "What difference does it make if the blade can make 50 cuts if the handle is that uncomfortable you stop after 10."

Llamedos, thanks.

-Cliff
 
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