Blackstone Silicon Grindstone

[woodyelf]

Since the blackstone silicon grindstone (SB 250) has the same grit as the SG 250 original stone but grinds HSS tools faster and also touches up tungsten carbide, why would I want to use the original SG 250 grindstone?  If there is a reason, you should at least explain that in your "Grindstone" page on this web site.

[Jeff Farris]

While the SB stone cuts HSS faster than the SG, it does not cut normal tool steel as quickly or efficiently as the SG. While the engineers disagree with me, I personally don't feel the grader is quite as effective on the SB stone, either.  I can't get as fine a finish on tool steel with a graded SB stone as I can with a graded SG stone.