BEST Folder Grinds: hollow or flat

Flat grind, the think it is the best compromise between strength and slicing ability. A full flate grind to the spine seems to be stronger than a hollow grind and still be a great slicer, if my Spyderco Military is any indication. Then again what do I know.
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well I glanced down the posts and it seems I am in the minority. I have to say that everyone is probably right about flat being stronger....but in reality...how much... with the steels and heat treating that we are getting today I just dont see people breaking their knives using them in a normal fashion....that said....hollow grind lends itself to resharping half way up the blade with the same edge geometry....I have seen umpteen Randalls with edges thicker than an axe after many years of use.....thats what turns me off about flat grinds.
 
Flat grind all the way up to the spine. They just seem to cut and sharpen the best. Most hollow grinds I see on production knives are way to thick. A lot of custom hollow grinds are just way to thick but then there are also some flat grinders out there that are way to thick also. A good grind in either case should be about .010 along the edge. I like the grind all the way to the top and its just not really feasable with a hollow grind.

Arthur D. Washburn
ADW Custom Knives.

[This message has been edited by BeowulftheGeat (edited 11-24-2000).]
 
Flat grind if the blade is thin, otherwise very high hollow. Sharper. Uses are general utility such as cutting rope, cardboard, paper, some plastic, some cloth, etc.
 
If it is done right I like flat grind better - full flat grind to a very fine edge. If it isn't to a fine edge I don't like it (that's the primary reason I haven't gotten a CS Master Hunter - all the examples I have seen have had very thick edge bevels). Otherwise, I do like deep hollow grinds as long as it is not too thick right behind the edge.

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Die Entropie der Welt strebt einem Maximum zu - R.J.E. Clausius
 
"Which do you like best?"

Hollow

"Why?"

Knowing that it takes skill to do it right, and it looks sleeker, and cooler
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overall

"HOW do you use the knife?"

Everything from zip ties to tape, cardboard to wood. Food, utility, fun, pretty much all of the normal sh.tuff in life that needs cutting, opening, shaping, removing...etc

"Which is best all around?"

Yeah, like I'd know
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...

Brandon

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Quis ut Deus
 
In talking with makers who have done both grinds it seems to be the general consensus that a hollow grind is easier to do than a flat grind.

Arthur D. Washburn
ADW Custom Knives
 
I prefer flat ground blades. Much of the actual cutting that I do involves the entire blade completely penetrating the material being cut (such as cardboard and thick, heavy-duty rubber hose). A flat grind doesn't bind like a hollow grind does.
For all-around use, the flat grind gets my vote, but that's based on my use. I suppose it's a personal preference "thing" (most "things" are, I think).
 
Originally posted by tom mayo:
well I glanced down the posts and it seems I am in the minority. I have to say that everyone is probably right about flat being stronger....but in reality...how much... with the steels and heat treating that we are getting today I just dont see people breaking their knives using them in a normal fashion....that said....hollow grind lends itself to resharping half way up the blade with the same edge geometry....I have seen umpteen Randalls with edges thicker than an axe after many years of use.....thats what turns me off about flat grinds.

Great points, Tom. Years down the road, I can imagine what my Busse Mean Street will look like. But what about blades that are much thinner than Randalls? And the width (not thickness) has to play a role as well, doesn't it? A really wide, thin blade would seem to me to be better flat ground--although my old carbon steel Chicago Cutlery butcher knife is thin, wide, and hollow ground and boy can it slice! But--I don't use the butcher knife for anything but cutting food on a cutting board. I could quickly destroy the blade if I used it otherwise.

And I think the "old timey" view was that flat ground was the best but, as you pointed out, steel is not what it used to be. We have knife steels out there now that can put up with a lot more abuse than our grandfathers' steel. At least I think that's true, isn't it? It would be interesting if someone knowledgable about such things would comment. Was the steel used for quality knives around the turn of the century (and earlier) really poor compared to modern steels. Or what about back in the 40s and 50s, when people were using (and are still using) springs from cars to forge blades?

Here's what Ed Fowler had to say about hollow grinds: "What is not generally known is that the first hollow-ground blades were made by a knife manufacturer and sold to slaughter houses as a cheap "disposable" knife to replace the more traditional blades supplied at the time. The manufacturer could save time and labor grinding hollow-ground blades because they were easier to sharpen. They were also money makers because they did not last as long as the more traditional blades and were discarded when no longer serviceable. They didn't last--the edges chipped out when put to heavy work and hollow-ground blades were soon abandoned for such work."

Now I'm wondering, was part of the problem with hollow ground blades in those days just poor steel?

BTW, here is Ed's comments about flat ground blades: "The problem with the flat-ground blade is that the cut is made with three surfaces. A second problem is that the blade is thin near the edge and can chip out when put to hard use."


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Hoodoo

I get some pleasure from finding a relentlessly peaceful use for a combative looking knife.
JKM



[This message has been edited by Hoodoo (edited 11-25-2000).]
 
It think it all goes back to what you learn Darrell. I learned hollow grinding when I first started making knives because that was what my teacher taught me. For a long time, that's all I used on knives.

The same with a collector/carrier. You chose knives with the type of grind your Dad or Grandpa carried. Sometimes there's no particular reason, just a knife's overall appearance, brand, style and price.

But, to answer your question, my favorite grind for a 'pocket knife' is the flat grind. Of course, after years of sharpening, it will need to be re-ground to be useful. But then, so will the hollow grind. Personally, I've never sharpened a knife to the point where it would have to be re-ground. Hard to keep one long enough. Good luck on your poll.
 
There were some recent comments in the forums about CHOPPING with a folder.

Do you chop with a folder?
My point here is not to start a Shyt storm.

I just want to know?

Also in my original post I should have mentioned that I am not trying to pit one against the other. I am just searching for good answers.


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Web Site At www.darrelralph.com
NEW WEB SITE TAKE A LOOK!!!!!!!!!
New projects and pics to look at !!!!

[This message has been edited by Darrel Ralph (edited 11-25-2000).]

[This message has been edited by Darrel Ralph (edited 11-25-2000).]
 
Darrel,
Chop with a folder? No, I don't chop with a folder. The right tool for the right job, if I'm going to chop something then I go and get an axe,hatchet ect. There have been some interesting responses to this thread. Some good points have been mentioned about both blade grinds. This has given me some food for thought, thank you. Darrel, great topic!
 
No chopping here. But I do use a small folder to dissect some pretty tough critters, like seastars and sea urchins. These guys have a tough, calcareous endoskeleton. The tougher the edge,the better. Have to admit that the small sebenza has held up well for this task but so has my flat-ground SAK.

I think this is a great topic, Darrel. The more input from everyone, the better.

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Hoodoo

I get some pleasure from finding a relentlessly peaceful use for a combative looking knife.
JKM
 
Darrel,
There is NOTHING wrong with chopping with a folder! I just chopped some sharp cheddar and an entire stick of pepperoni!!
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NOOOO Problem!
I think that with the curvy lines of your folders, a hollow ground blade would be the ONLY way to go!!!
Not that it isn't a FANTASTIC, well made folder with excellent materials but to me, the Spyderco Military with the flat grinds intersecting the thumbhole is about the BUTT UGLIEST knife EVER made!! WOW....did I just say that??? ooooops!! (not putting down any Military owners, I have one too) Now, take the Terzuola Starmate model with those nice hollow grinds......
The Military model may cut cardboard or other materials better but aesthetics play an important role in what turns me on about a knife
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Sometimes people will sacrifice a little function for form
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Neil

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Talonite??? Stellite!!!
Knives in STOCK!! I just updated my website, PLEASE take a look :)


blackwoodknives.com
 
As far as blade grinds go, as long as it cuts well, who cares? Personaly I like a thinner edge coupled with strength. That's why I prefer the flat grind. But my favorite folder, the Spyderco Native, is hollow ground. It works very well for all applications.
Do I chop with a folder? No. That's what axes and machetes are for

Paul
 
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