Blade Grinds

G

GOTTMILKK

Joined
Dec 29, 1999
Messages
17

I am new at this I am thinking about buying a high dollar grinder so I can learn to hollow grind. Now my question, witch type of grinde is better flat or hollow? Most of the knives I make are small to medium hunting utility knives. thank you, Gene
 
this topic has been discussed many many times on this forum....if you look back over some of the old posts you will find them.. but to answer your question...both have very definite advantages and drawbacks...depending upon usage..for your purpose..as stated above..i believe the hollow grind will serve you well.

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http://www.mayoknives.com


 
I started flat grinding and found it limited my creativity! Check out the work by makers like Brend, Broadwell and Sika and then decide if you still want to flat grind!!
You can see examples of their work at http://www.robertsoncustomcutlery.com/
The on going arguement that flat ground blades cut better can be shot down buy using a large contact wheel! If I grind a knife on my big 13" wheel it's impossible to tell if it is flat OR hollow ground
smile.gif

Neil

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New Hawkbill Pics!
http://www.geocities.com/Eureka/Meeting/5520/index.html



[This message has been edited by Dr.Lathe (edited 01-10-2000).]
 
Hello!
Try a full convex grind, too. Test the performance of the different grinds. I bet you will stay with the convex grind.

Achim
 
Allen,
I think the Flat Ground-Hollow ground thing got me fired up again! I in know way intended to put down the flat grinders! I like flat ground knives. I bought 2 of Lynns this year.
After I grind a blade 1 1/4" wide with the the big contact wheel, I usually finish with a scotchbrite belt. This adds another 1/4" to the wheel diameter!! On a full grind on this size blade after polishing, I measure .002-.004 of "hollow".
I think a better term would be wheel ground or platten ground!
Didn't mean to sound like an *%#hole in the above thread,
Neil


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New Hawkbill Pics!
http://www.geocities.com/Eureka/Meeting/5520/index.html

 
i like flat grinds on regular blades and hollow on big daggers. flat grinding lets me shape the plunge area easliy to match the curve of bolsters, can't do that with the hollow. i do all my finish flat grinding on a disc.

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Tim Herman
visit Herman Knives at:
Herman Knives

 
Hello,

Neil no harm,I didnt take it that way anyway. Was just kiddin with ya myself...

Take Care,
Allen Blade


 
I'm a flat-grinder. I learned it the way RJ Martin does his. I just never progressed to the hollow, yet. Somewhat limited, maybe, but strong, strong, strong at the edge. Someday I have to take Jim Siska up on an offer and learn the hollow.

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Chris Hatin
hatintec@dellnet.com

www.geocities.com/chrishatin/hatintec.html

"Are you ready for the defendant, Judge?"
"Yup. Bring the guilty bastard in."
 
The plunge area is where the tang meets the bevel. Some people prefer a nice square gouge there, that is easier to do on flat grind.
It depends on the knife for me, right now I'm trying some flat grinding and slightly convex grinding because I'm using a 4x 36 sander. I have hollow ground on my bench grinder but it didn't give me much control and the blades had to be very simple.If I had a better grinder I would probably hollow grind.
Alot of people say that a flat grind is stonger just above the edge because it is thicker than a hollow grind. That may be true, but others say that the thin edge of a hollow grind cuts better, and the blade can be thicker above the grind if you dont do a full face grind of the blade. I've used both and I think if you have the knife scary sharp, they both cut fine. So its more a matter of how you want it to look if you ask me.

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Fix it right the first time, use Baling Wire !
 
technically matt....its where the Ricasso mets the grind start....tang is farther back. but back to flat grind....a lot of guys really like it...i only use it on a few knives...for very definite reasons...but the main reason i DONT like it is what i say early on in a lot of randalls.....if you use a knife a lot you have to sharpen it a lot. and a well sharpened flat grind tends to get WAY to thick too soon...so that you end up with an axe edge instead of a nice crisp razor edge that you should have...i appreciate the comments above...and on a .125" thick blade this may not be a problem, but on a quarter inch fighting knife it certainly is...by the way mr tim herman...does anyone ever use those works of art?????? i know jack busfield and most of his knives get stuck in display cases...

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http://www.mayoknives.com


 
Originally posted by Matt Shade:

It depends on the knife for me, right now I'm trying some flat grinding and slightly convex grinding because I'm using a 4x 36 sander.
Click to expand...

Matt, I've got a 4x36 from Central. I've been wondering how to flat grind with it. Can I send you an email off-line for some more info?

Jon
jedwards@access1.net

 
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