Gear sprocket The tooth surface is tearing and growing for a long time:
Reason 1: Uneven hardness of the tooth blank material Elimination method 45#40 chromium steel recommended normalizing hardness is 179-217, 18CRMNTI is 157-207.
Reason 2: Hob blunt Elimination method Transfer knife or sharpening hob
Reason 3: Improper selection of cutting amount Poor cooling, elimination method: Select the appropriate cutting amount to fully cool the cutting area
