contact wheel size

  • Thread starter Thread starter ydduit
  • Start date Start date
Y

ydduit

what size contact wheel is recommended for hollow grinding? I am new to hollow ground blades and not sure what size to use. I plan to start out with making 3 1/2 - 4 inch hunters on 1 1/4 by 1/8 stock.
Any help would be greatly appreciated.
 
I have a 8" on the burr king I use, but would really like a 10, or maybe even a 12 for hollowgrinding. I prefer the look of a hollow grind that goes all the way to the top or at least close. Personal taste type thing though.

James

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Those who are willing to trade freedom for security deserve neither, and in the end, seldom retain them!
 
I have used an 8 inch for several years. I just recently went to a 10 inch, like the ten inch much better, higher grind, seems much easier to use for whatever reason.
 
I use a 250 mm wheel ( 10 " ) and think this is a good size. For grinding blades with a grind that extends to the spine, an even larger wheel would be much better. An 8" wheel would be about very minimum unless you're planningvery narrow grinds.

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Totally new website!
www.wilkins-knives.com
 
Thanks for the help guys, I guess i will go ahead and order a 10" wheel as the grizzly i just rdered comes with a 6". THANKS AGAIN........
 
A more important consideration is cross sectional geometry. The use of the knife determines the thickness of the blade at the edge, i.e. kitchen knives should be ground thin enough to see through!
And the geometry must be limited to the type of steel. ATS-34, with high molybdenum content, can take a thinner grind with less thickness simply because it is tougher than 440C at the same hardness.
Be creative with your grinds. Standard mass marketed factory knives use an 8" wheel, but a shallow grind. (they want you to sharpen three times then throw it away and buy another).
Take your time to study the different effects of differing contact wheels. Hell, grind a hollow with a .375", it's wild!
And grind all the way through a couple, just to see how far you can go. Make a straight razor first, then an axe. You'll learn.

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Jay
www.gilanet.com/JayFisher/index.htm
 
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