Scandi edge?

[canid]

i wrote something else a while back about the effects i figure bevel geometries have on cutting elastic materials, but i can't seem to remember what and where.

[JCavSD]

Poco: in short; the edge and the grind are two completely different things.

So are you saying they are different and have no relationship to each other?

[Pocomoonskyeyes3]

So are you saying they are different and have no relationship to each other?

I think what he is saying is that The edge is like the shell of the Tent... It does the actual work... The "Grind" Is like the Poles/frame, It supports the edge.

[JCavSD]

I look at it as similar to the contact patch of a motorcycle tire...the contact patch being the edge. As the bike leans the contact patch changes direction, and to some degree changes location. The shape (grind) of the tire has a direct impact of how and where the tire wears. Motorcycle tires are designed for various "activities" like sport bike riding, touring, sport-touring, cruising, etc. The shape of the tire has a major impact on wear resistance and integrity. This making sense or am I on crack again?

[canid]

So are you saying they are different and have no relationship to each other?

no, i'm saying that they are different and are indirectly related.

Poco's pretty much got it.

I look at it as similar to the contact patch of a motorcycle tire...the contact patch being the edge. As the bike leans the contact patch changes direction, and to some degree changes location. The shape (grind) of the tire has a direct impact of how and where the tire wears. Motorcycle tires are designed for various "activities" like sport bike riding, touring, sport-touring, cruising, etc. The shape of the tire has a major impact on wear resistance and integrity. This making sense or am I on crack again?

that is a poor analogy, as the tire acts on the road surface in a completely different way than a blade acts on a material to be cut. the formulae to describe how the two sets of materials influence one another involves most of the same terms, but in different, and almost inverse ways.

since the primary purpose of a motorcycle tire is to maximize kinetic friction while maintaining the necessary contact patch radius to allow effective turning i would say that if i meant to design the least efficient knife for cutting asphault, while still not wearing more quickly than nessecary, that tire would probably be the result.

those are not the same thing at all.

[JCavSD]

no, i'm saying that they are different and are indirectly related.

Poco's pretty much got it.



that is a poor analogy, as the tire acts on the road surface in a completely different way than a blade acts on a material to be cut. the formulae to describe how the two sets of materials influence one another involves most of the same terms, but in different, and almost inverse ways.

since the primary purpose of a motorcycle tire is to maximize kinetic friction while maintaining the necessary contact patch radius to allow effective turning i would say that if i meant to design the least efficient knife for cutting asphault, while still not wearing more quickly than nessecary, that tire would probably be the result.

those are not the same thing at all.

The least efficient "knife" for cutting asphalt, in terms of tires, is the car tire. Different beast as the contact patch is large and the angle rarely changes. Motorcycle tires are designed to function at more radical angles. As I understand it more weight equals more friction, and where the weight is biased will largely determine the extent and location of the wear pattern. This would apply to both steel and rubber. Certain applications dictate the shape and compounds used in tires, much like the grind and compounds used in knife steel.

[canid]

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A: properties of a knife blade
E: principles relevant to cutting mechanics
C: your last post.

if you read and pay attention to my above posts, you'll understand that i addressed the influence of applied force [mass, velocity and it's relationship to kinetic friction] on the knife blade, and addressed the relationship of structural properties to cutting action.

i've spent about as much of my free time in this conversation as i would like to, so take it or leave it; it's up to you.

[crashdive123]

Okie dokie fellas. Let's all go sharpen our knives and go for a walk in the woods.

[canid]

it's non problem. i'm done being short tempered and i'm stepping out of the thread.

[Pocomoonskyeyes3]

Okie dokie fellas. Let's all go sharpen our knives and go for a walk in the woods.

HOT DOG!!! We've been "Ordered" To go Play!!! Man it doesn't get any better than THAT!!!

Uh, one question though..... Does this mean that I have to resharpen my knives that I JUST got through sharpening????

[crashdive123]

OK - Poco - you just grab five knives and head out. Everybody else - strop up.

[Rick]

Hey, honey....have you seen my strop? The guys are stroppin' and I wanna go!!!!

[Pocomoonskyeyes3]

OK - Poco - you just grab five knives and head out. Everybody else - strop up.

Awww man.... JUST 5???? Now it will take me all day to decide WHICH 5...

Forget it, I'm just gonna' take ALL of them!!! WOO HOO!!!!

[NCO]

I'm away for two days and this whole thread is a mess!!

Q:s and A:s!!!

Q: Why mora looks a LITTLE bit like a puukko?
A: The Swedes had to copy the design from the best to be able to sell otherwise so unusably crappy product.

Q: Is mora good?
A: No

Q: Are puukkos good?
A: Yes

Q: Why Finnish industries use mora as a work knife so much?
A: It's cheap and so bad quality that no one cares what you do with them.

Q: Why NCO hate's moras?
A: He has used them.

Q: Are all people who like moras delusional?
A: Yes.

[Camp10]

I've been staying out of this debate to see how it would all end up but it is my turn to weigh in..The most important element in a lasting edge is the steel your knife is made out of and the makers ability to harden it. Period! Want proof?

I grabbed the blade out of my BOB. It is a test knife I made out of CPM S30V. It was actually my first attempt at hardening this steel. Anyways, I also took my Mora and cut a chunk out of it. My blade is a hollow ground primary bevel with a convex edge. You can see my "inferior grind" is still perfect at the edge...huh?..Good steel, good heat treat.

Oh, and NCO..dont take this as a slam on Mora's because if I had a Puukko (and who would) I'd cut it in half! LOL!
the Mora
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Mine
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Yeah, the pics are aweful but there are no tricks here just a bad photographer. Sorry.

[NCO]

I won't. I take it as a proof! Mora=mass produced, puukko=craftsmanship, basically you proved here my point!

[Rick]

I used to have a ban button written in Finnish. Where the heck did that thing go?

[NCO]

That's a bit under the belt, don't you think?

[Rick]

Muhahahahahahaha!

[NCO]

You are evil...