The Tormek SB-250 Blackstone Silicon has been developed for shaping and sharpening HSS and exotic alloyed steels. It can also touch up tungsten carbide. It does not offer faster steel removal on ordinary carbon steel. The combination of abrasive hardness, shape and grain size is optimized to work efficiently at the Tormek system’s low RPM. Its faster material removal is an advantage especially when shaping tools with a large bevel surface, where the grinding pressure is limited, for example, planer blades and woodturning skews. This Grindstone measures 10" in diameter and 2" wide. For metric folks, that is 250MM x 50MM.
The grit size 220 is the same as the Tormek Original Grindstone and can be altered to work like a 1000 grit stone with the Stone Grader SP-650. Thanks to its sharp and relatively small grains, the Blackstone removes hard steel efficiently even at low grinding pressure. The Blackstone Silicon also offers exceptional wear resistance. It can even touch up tungsten carbide, where the tool already has an established shape.
This stone is sized for the Tormek T8, Tormek T7 and 2000 models.
Made in Sweden.