Stone Sigma Select II 10000grit 152x25x6mm on blank

The 10000 grit Sigma Select II stone measures 152х25х6mm and is used for finishing sharpening processes.

The manufacturer of Japanese water whetstones Sigma Select II is Sigma Power Corporation from Tokyo. This sharpening set has been developed as a premium stone specially designed for hard to sharpen high alloy steels such as high speed steels. Sigma Select II whetstone grit sizes include 240, 400, 1000, 3000, 6000, 10000 and 13000 grits. Requires soaking before use.

The Sigma Select II series stones have unique features that set them apart from other Japanese water sharpeners. The abrasive particles of the Sigma Select II series stones are not held together with a traditional synthetic binder (eg organic or magnesian), but with the help of thermal sintering. Actually, Sigma Select II bars, like natural stones, do not contain a bunch in their classic version. This gives a significant advantage, in comparison with stones on conventional bonds, in the number of cutting edges per unit area of ​​the working surface and, as a result, in the abrasive ability and efficiency of the stone. Along with this, the abrasive included in Sigma Select II stones has a complex complex composition, which includes both components of natural minerals and a synthetic component of ceramic corundum. All this, although it greatly increases the cost of the manufacturing process, gives a response when working with Sigma Select II stones that is as close as possible to Japanese natural stones and allows you to process even the hardest steels.

The Sigma Select II series stones are quite soft and work with a rich slurry that promotes efficient metal removal. However, the Sigma Select II bars hold the geometry well. Alignment of Sigma Select II stones is carried out on glass, on silicon carbide powder or with the help of special leveling platforms and benches.