Gear Hob Cutter Sharpening - CBN Wheel Model: 4V9, 4BT9, 4V4 Application: High - Speed Steel HSS Hobs Used Green silicon carbide grinding wheel dress CBN grinding wheel are CBN (Cubic Boron Nitride) grinding wheels are specially used for gear hob cutter grinding. CBN (Cubic Boron Nitride) due to its hardness, thermal resistance which is higher than diamond's, allowing work at 1,900C (3,500F), and the good chemical resistance of CBN to ferrous alloys. The roughness and sharpness is the most important for the CBN wheels.
