With the Norton 66243570537 cup grinding wheel, you sharpen and finish hardened steel, tool steel, and hss with exceptional accuracy. The vitrified bonded white aluminium oxide (38A) continuously exposes fresh cutting edges as it fractures, ensuring cool, free-cutting stock removal without heat build-up or workpiece burning. Featuring a type 06 straight cup geometry with an outer diameter of 200 mm, a thickness of 40 mm, and a secure 32 mm bore, this wheel mounts steadily onto stationary tool grinders. Operating safely at up to 45 m/s, it delivers consistent surface contact for precise tool reconditioning and flat-face grinding.