I have the T8 with the SG-250 stone. Assuming I keep the stone grade at the nominal 1000 grit, how long will this last before it gets clogged with steel particles and will need to be regraded, or maybe even resurfaced?
I find that the SG-250 returns to an average 600 grit after a couple of knives. If I am resharpening a knife I have previously done I will use this mid grit then use the stone to get near 1000 for finishing before honing.
How long it will stay at a particular grit is also related to the pressure you apply but it won't be too long.
Quote from: John_B on April 27, 2025, 09:07:03 PMI find that the SG-250 returns to an average 600 grit after a couple of knives. If I am resharpening a knife I have previously done I will use this mid grit then use the stone to get near 1000 for finishing before honing.
How long it will stay at a particular grit is also related to the pressure you apply but it won't be too long.
Thank you, that makes sense and I will pay a bit more attention to using the stone to get back to 1000 after a few knives
Ed,
I don't think it's an easy answer to give. I find that I can resharpen a LOT of tools before I need to re-true the stone. As for re-grading, that's more driven by the need for making the stone go back from 1000 grit to 200 grit. For many blades, I don't have to do that.
Rich
Quote from: eckorsberg on April 27, 2025, 03:12:38 PMI have the T8 with the SG-250 stone. Assuming I keep the stone grade at the nominal 1000 grit, how long will this last before it gets clogged with steel particles and will need to be regraded, or maybe even resurfaced?
One method I've been using to keep my grindstones as clean as possible during sharpening, was adding magnets to the bottom of my water trough.
Two flat button-shaped neodymium magnets pasted on the outside (bottom) of the trough have been pulling almost all metal particles from my grindstones. Once I started doing that, my ACC-150 solution has been kept clear, and I see a lot more swarf retained in the trough.
Quote from: eckorsberg on April 27, 2025, 03:12:38 PMhow long will this last before it gets clogged with steel particles and will need to be regraded
How long is a piece of string? Depends on how much sharpening you are doing, and even more so how soft the knives are that you ar4e sharpening. Cheapo knives will clog your wheel faster than higher hardness knives but very hard knives will glaze the wheel.
Once you get used to the feel of an effective wheel you can tell when it has stopped cutting. Also if the sound changes indicating that the wheel is too coarse then you can re-grade.