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BLADE SHOW ’2015' ~ Show Us What You Got!

Dont understand why you put such stress risers in the blade - tang transistion area, reducimg the cross section in width and thickness by 50 % with such sharp corners.
 
Armin Drumm said:
Dont understand why you put such stress risers in the blade - tang transistion area, reducimg the cross section in width and thickness by 50 % with such sharp corners.
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What blade are yo talking about??? Best to quote the one you are referring to.
 
Got a sheath for this little guy...80crv2 steel with African blackwood handle. Made to use it's a cuttin' fool:)

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Armin Drumm said:
Dont understand why you put such stress risers in the blade - tang transistion area, reducimg the cross section in width and thickness by 50 % with such sharp corners.
Click to expand...
Shouldn't be an issue. Being a Mastersmith, Lin had to put a knife with this type of construction through a 90 degree bend. It's a tried and true method that's been in use for centuries.
 
Armin Drumm, having held multiple of Lin's blades at this stage I can tell you that the shoulders for the guard are no where near 50 percent of the cross section. The images may make it appear that way but they are not that drastic. Also when the guard is mated flush with the shoulders the tensile strength removes all and any issues that the cut in shoulders could potentially cause.

Chris
 
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How 'bout something a little different?
Not sure if I've seen one of these anywhere with a Carbon/Stainless San Mai welded blade with the forged in full-fledged Brute de Forge guard?
(I will say that the term Brute de Forge has certainly achieved a rather relaxed definition these days with - it seems - everybody calling their knives BDF if they have a little forge scale on it, which is more like they just didn't finish grinding, rather than any type of forging function. Oh, well.)
Anyway, this was inspired by an enthusiast of mine asking me if I had every done one.
I hadn't - until now.
After cleaning up and etching the blade, I mortised down the handle on each side to smooth up the handle wrap transition from handle to ricasso. (The first picture shows this.)
1095/420SS San Mai Brute de Forge with Ray skin and silk cord wrap.
I had my camera out and took a couple impromptu photos.
The wrap job will get an epoxy treatment tomorrow.







 
RogerP said:
Best to know what you are talking about as well.
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I don't think the question was out of place. Just because we are used to a particular kind of construction and it does help us in the "invisible joint" makeup, doesn't mean that is the strongest design, which is not.
The test blade for the 90° bend, as far as i remember are soft as a tuffy but the very edge, and i won't swear they are milled all around the tang in the joint area.
The thickness of that blade and tang is so that it can bear a bit of a stress riser for the sake of a cleaner construction, that's one of the possible answers to a simple question..
 
That's a nice change of pace piece for you Karl, and I'm sure it would make a handy companion.
 
RogerP said:
Best to know what you are talking about as well.
Click to expand...

Beeing knifemaker since 1984, and having a Univesity Master degree in mechanical engineering i guess i know what i am talking about.

The 50% referred to the cross section!
And at 50% you arrive quite fast.
Put 2 shoulders with 15%of the tang width at back and edge side of the tang and you arrive at 70%.
Now add a step with 15%of the blade thickness on the left and right side of the tang and you are at 70% of those 70% which results in remaining 49% of the original cross section !

So with adding shoulders / steps off 15% on all 4 sides of the tang you reduce the cross section on the most stressed part of the blade/ tang from 100% to 49% !
This in combination with some sharp corners from milling those steps is the perfect starting point for a crack, especially on a blade of this size.
 
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Armim,
I appreciate your concern and it is duly noted. I will not bog down this thread in debate over this perceived issue. I may agree with you in the technical aspects of the naked blade, but I believe the addition of properly fit hardware will change the dynamics considerably from torsion and side to side/up to down shock into tensile. In a nutshell, this is what make the hidden tang construction able to stand up beside Full Tang construction. It is no longer a blade. It is then a completed knife.

You have the advantage of me with your engineering background and I do not question your knowledge. Please allow me to take a more pragmatic, albeit less complicated, approach to my work. Thanks
 
I don't wish to derail this further either (though this post probably is) but I can't help but wonder what people are doing with these knives, these CUTTING AND SLICING tools, that are causing or "certainly going to cause" all these catastrophic failures? Funny that people mention it all the time, but you seldom see it even when the knives are regularly put to use by the makers during testing, chopping hard woods or antler, which you could argue is at least border line abuse for a knife.

Back on topic to save the post ;), Karl, definitely a bit different from your 'norm' but I like it. I think the combining of styles and materials on a knife is always a winner. I agree with your assessment of the Brute de Forge term.

Ben, that little knife ought to be a cutting machine!
 
Well said Lin and John. Lin, looking forward to what you come up with for handle and guard. Your signature forged stainless fittings perhaps?
 
Roger, Yes. I forge the strap for a D guard yesterday from some 420 stainless and should be able to have pictures pretty soon. I do have a sketch and have gotten past the "indecision" stages. I want this piece to have a vintage feel while retaining it's modern aspects, the most obvious being the Damascus blade. A lot of the originals enlists brass or yellow metals so I have some Bronze that will be in the fittings along with the stainless. I have a piece of stag that I have been saving for such a piece. In spite of it's being a called a sword, these are quite light and almost dainty in heft and feel.
 
Here's a couple I'll have on the table.


6 bar W pattern twist modified a little- with walrus ivory

Feather pattern and stag


Hope you can stop by and get a closer look,

Thanks for lookin

Bill
 
Lin, that sounds perfect. I hope you have this with you at the show. It would be worth the trip just to hold it.

Bill, those are some clean and classy bowies - well done!
 
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