Ridges, Ruffles, & Mini- Serrations

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brianNH

Joined
Dec 16, 2002
Messages
537
Here is a macro shot of my new OD FSH with the mini ridges. Notice the verticle lines running parrallel to the edge.

If I'm not mistaken, it looks as though they are on my new SJ TAC as well.

busseridges.jpg
 
Yep, I SJTs I saw had those. It was easy to see on the green blades, but not at all on the black, and only a little of the tans. Pretty Cool!
 
I’ve been wondering what’s going on under the coating on my tan SJ TAC. There are some slight depressions in the surface that have to be intentional, and grooves below the tan coating would make sense.
 
That is wild! I know Jerry gave a description of the technology of the corrugated bevel. I can't remember what it was for though. Can someone explain it's purpose to me again.
 
theoritcally it would act like a set of fullers.

it would stiffen the blade, remove weight, and also act like... whatever the edge style is on chefs knives, where they have pockets cut out of the blade to keep potato's and the like from sticking to the blade.

by having ridges instead of flats, it will help to reduce binding and lower the amount of friction material generates as it passes over the sides of the blade.


of course, this is for the heavy corrugated beveling, as seen on the two new models. as to the stuff shown in the pic above - as far as i can logic out, its a better, faster, more precise way of creating knife bevels (computer ground). outside of that, little tiny cut marks like that will have a reletively minimal effect (as the user can feel it).

but then thats my logic, not first hand use or research. i could be wrong. all of what i said above could also apply to whats on the picture in this thread.
 
Interesting... I haven't noticed anything like that on my DC HO FSH. I guess I'll take another, closer, look.

I wouldn't think you'd see something like that on a hand grind. So yeah I'd have to say it has something to do with the way Jerry is grinding his knives now. He's been using CNC since, 2002, if I'm not mistaken. But as mentioned on this and other threads he has started doing beveling in a different manner. It was my understanding it was happening on the AK-47 and the knife with no name but I wasn't aware of any other knives being done this way. ???? Where's the #1 HOG when we need him.... :)
 
he may be putting the bevels onto the knives using a cnc machine, wich might not be what he had his patent on. the new style of bevel that is like an actual set of fullers may be the "corrugated bevel technology" rather then what is seen here.

as far as hand grinding as is shown on the picture in this thread, i cant think of how a person would ever get that kind of even striping on a knife by hand. maybe an even satin finish - but no way could they get it to curve with the edge like that without using a cnc machine or something to that effect.

i know that a person can do the basic idea of the "corrugated bevel technology" style edge by flutting the bevels, wich has been seen before (although not in the same way that has been seen on busse's) on custom knives. but again, thats the fuller style beveling, not what is show here.
 
I got the impression that this was a way to create a convex blade shape with the CNC. The FSHs that I own are completely flat ground, which you can achieve with straight-forward Blanchard grinding. Then you just put the edge bevel on it and you are set.

The SJT was advertised as the first Busse with full convex shape on both sides. I wonder if this new style was an outgrowth of that work and the search for an easier way to achieve the desired shape with as little hand grinding as necessary, especially for large/long blades. Hand grinding of the AKs would have driven a good man bad.

Rick - idly speculating
 
book'em said:
Not even a slight indication of ridges on my tan SJ TAC.
Click to expand...

What's the coating you have on yours? At Knob Creek, I could easily see them on the SJ's that were green, could see them with difficulty on the ones that were tan and could not see them at all on the black one's. It might have more to do with the coating that you can't see them

:D:D
 
The lines look like what is called "step over" when a contoured surface is machined on a CNC milling machine. The end mill moves over a little on each pass of the surface, thus creating little ridges. The distance of the "step over" and the depth of the cut, determines how high the ridges are, large distance and deep cut equals a "high ridge" (but removes material fast), small distance and a shallow cut results in a "low ridge" (but takes a lot of time). The CNC machining could do the majority of the material removal and create a consistant repeatable profile and then the knife could be finished on a belt sander to remove the ridges if desired.

:eek:
 
Eric Isaacson said:
What's the coating you have on yours? At Knob Creek, I could easily see them on the SJ's that were green, could see them with difficulty on the ones that were tan and could not see them at all on the black one's. It might have more to do with the coating that you can't see them:D:D
Click to expand...
ditto what he said.
 
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