I am using a t7 with the SB-250 wheel.
I am trying to shape a 1" Crown powder metal flat skew with a straight (not radius) edge. I am changing the edge angle from 45 degrees to 30 degrees. I am sharpening from the vertical mount to increase the grinding pressure. This is probably a worse case scenario with size of the chisel and the amount of steel I need to remove.
The grinding progress becomes slower as I get closer to the final bevel angle (at 220 grit). You would expect this as more of the bevel is pressing against the stone and therefore more steel needs to be removed. As I'm nearing the end of the grinding process, say 5% of the bevel left to grind, progress is minimal if anything. The only way I can make any progress in grinding the rest of the edge is to true the stone with the tt-50 truing tool (which gives me a fairly course surface on the wheel). After a few minutes of grinding, I'm making no progress again. Dressing with the coarse side of the stone grader makes no difference. I had to true the wheel 6 times just to reshape on side of the chisel.
The stone grader seems to be glazed (much smoother than the original surface) on both sides. It's relatively new, but I'm told the "glazing" is to be expected and it does not impact the performance of the stone grader. Is this limited grinding performance to be expected? I'll be eating through my wheel pretty quickly with the truing tool at this rate.
Any help would be appreciated.
I am trying to shape a 1" Crown powder metal flat skew with a straight (not radius) edge. I am changing the edge angle from 45 degrees to 30 degrees. I am sharpening from the vertical mount to increase the grinding pressure. This is probably a worse case scenario with size of the chisel and the amount of steel I need to remove.
The grinding progress becomes slower as I get closer to the final bevel angle (at 220 grit). You would expect this as more of the bevel is pressing against the stone and therefore more steel needs to be removed. As I'm nearing the end of the grinding process, say 5% of the bevel left to grind, progress is minimal if anything. The only way I can make any progress in grinding the rest of the edge is to true the stone with the tt-50 truing tool (which gives me a fairly course surface on the wheel). After a few minutes of grinding, I'm making no progress again. Dressing with the coarse side of the stone grader makes no difference. I had to true the wheel 6 times just to reshape on side of the chisel.
The stone grader seems to be glazed (much smoother than the original surface) on both sides. It's relatively new, but I'm told the "glazing" is to be expected and it does not impact the performance of the stone grader. Is this limited grinding performance to be expected? I'll be eating through my wheel pretty quickly with the truing tool at this rate.
Any help would be appreciated.