06-17-2017, 08:59 PM
Mr. Mark uttered, “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.”
I mostly agree. Sharper particles cut steel better and produces better tooth. Not doubt about that. However, IMHO, sharp larger particles produce larger, more separated scratches and hence a more gnarly edge. Taken to extremes for example, a new 1000 grit belt won’t produce as toothy an edge as a new 80 grit belt.
“The most obvious manifestation is the difference between a brand new belt and one that's been slightly used.”
I totally agree and I hate that! Nothing like the first couple of passes on a new belt. I just wish they stayed that way longer. It sure doesn’t take long before the reduction in cutting in obvious. I’d love to have a 120-150 grit diamond belt, but not only are they hard to find, they are extremely expensive. As I remember, close to $200. Way more than I’d pay for belt!
“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.”
Yup. Unless I’m trying to hog off steel, I use very light pressure. So light in fact that there is almost no visible deflection of the belt even sharpening a couple of inches above the platen on the Kally. No heat either.
I mostly agree. Sharper particles cut steel better and produces better tooth. Not doubt about that. However, IMHO, sharp larger particles produce larger, more separated scratches and hence a more gnarly edge. Taken to extremes for example, a new 1000 grit belt won’t produce as toothy an edge as a new 80 grit belt.
“The most obvious manifestation is the difference between a brand new belt and one that's been slightly used.”
I totally agree and I hate that! Nothing like the first couple of passes on a new belt. I just wish they stayed that way longer. It sure doesn’t take long before the reduction in cutting in obvious. I’d love to have a 120-150 grit diamond belt, but not only are they hard to find, they are extremely expensive. As I remember, close to $200. Way more than I’d pay for belt!
“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.”
Yup. Unless I’m trying to hog off steel, I use very light pressure. So light in fact that there is almost no visible deflection of the belt even sharpening a couple of inches above the platen on the Kally. No heat either.