06-17-2017, 11:34 AM
(This post was last modified: 06-17-2017, 11:47 AM by Mark Reich.
Edit Reason: To add...
)
It is always easy to misconstrue anyones' posts on any forum. Nature of the beast. I know I can't always convey the right message in any single post.
Mr. Grepper, I understand your quest for maximum tooth, and I've enjoyed pursuing your grail for my own betterment.
IMHO, the shape of the abrasive particle is more important than it's size. Sharp particles leave sharp teeth. Worn or smoother particles can't leave sharp scratch patterns. Even though the scratches may be bigger with larger grit, that doesn't necessarily give your edge more tooth.
The most obvious manifestation is the difference between a brand new belt and one that's been slightly used.
The next best example is different types of abrasive compounds on hones. CBN is very nearly as hard as diamonds, but the particles are smoother. CBN removes a burr much better than diamond, but diamond leaves much sharper teeth.
I often deburr with boron carbide or CBN, then give the edge tooth with diamond compound.
I forgot to address the issue of "pressure" against the belt- IMHO, more pressure is almost always detrimental to the edge, no matter if it's against a belt or stone or hone. Great sharpening requires a delicate touch, not a heavy hand.
Mr. Grepper, I understand your quest for maximum tooth, and I've enjoyed pursuing your grail for my own betterment.
IMHO, the shape of the abrasive particle is more important than it's size. Sharp particles leave sharp teeth. Worn or smoother particles can't leave sharp scratch patterns. Even though the scratches may be bigger with larger grit, that doesn't necessarily give your edge more tooth.
The most obvious manifestation is the difference between a brand new belt and one that's been slightly used.
The next best example is different types of abrasive compounds on hones. CBN is very nearly as hard as diamonds, but the particles are smoother. CBN removes a burr much better than diamond, but diamond leaves much sharper teeth.
I often deburr with boron carbide or CBN, then give the edge tooth with diamond compound.
I forgot to address the issue of "pressure" against the belt- IMHO, more pressure is almost always detrimental to the edge, no matter if it's against a belt or stone or hone. Great sharpening requires a delicate touch, not a heavy hand.