Flat grind versus Hollow grind

Jerry Hossom · Jan 9, 2001

Did anyone here argue that the grind they don't do is better?

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db · Jan 9, 2001

Joe when you do your testing try a peice of PVC pipe, cut both ways through it and down it. This is the stufff I really saw anot a difference. Well I kind of did and the flat was the worst of the 3. Kind of surprized me. As it gets thicker faster it started to bind quicker. As the thick part of the hollow grinds got down to the start of the cut the wedging of the cutting edge was far enough down to give the uper thick part room to get into the cut. Is that clear or understandable? Ummm don't know how to say it . Give it a try hopefully you will see

BARRY JONES · Jan 9, 2001

Joe Talmadge,
I hear ya and I agree 100%.

My experience says that the 3 grinds each have their own place. You just have to match the right grind with the right blade size and intended use.

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vaquero57 · Jan 9, 2001

Okay guys I personally flat grind. But what is a convex?

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db · Jan 11, 2001

Convex is like a flat grind that is bowed out.
Re-reading Joes post I think we do agree. A thick wedgie sabre grind, of any type, flat hollow convex, is not the best cutter.

Guy Thomas · Jan 10, 2001

The convex grind is the opposite of the hollow (concave) grind. Sounds to me that the best of all worlds here would be the flat grind and special purpose knives would get the grind most suited to that use.
For an all-purpose knife though it seems like we'd have to decide what the most common purpose of most knives is before you made a statement like I did!-Guy Thomas

steve porter · Jan 14, 2001

Thank you all for your assistance
Regards
steve

Belstain · Jan 14, 2001

I thought razors were hollow ground so that you could use the spine of it as a built in angle guide for sharpening to get that perfect 10 degree angle everytime. I have a hatchet that has a thick convex edge but I can still get it just as sharp. I have even shaved with it while camping.

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Andrew McLurkin · Jan 14, 2001

I like the way flat grinds look. Which grind cuts better is harder for me to determine. I would say they're all good if properly ground, heat treated, and sharpened.