Sunnen CBN Stone, 280 grit, from the K3 Series, a Borazon (CBN) honing abrasive designed for precision bore finishing in Sunnen honing systems. This stone provides consistent cutting action for reliable material removal and a refined surface finish on hardened steels and similar alloys. The 280-grit size sits in the mid-range of Sunnen's honing process, bridging coarse roughing and final finishing steps. Suitable for production environments that demand repeatable bore tolerances and long service life when used according to Sunnen's guidelines.
