Gear hobbing cutter is high speed steel material

So we choose resin bonded CBN grinding wheel.

The first step is use GC grinding wheel to repair the resin CBN grinding wheel

To make sure the concentricity is good,

Then grind gear hobbing blade.

During grinding,if you find the CBN wheel you are using is a little bit hard, you should slow down the line speed from 40m/s to 30m/s.

The roughness and sharpness is the most important for the CBN wheels.