Plastic deformation of the cutting edge

?Likely causes

• Cutting temperature and pressure are high (high speed or feed)Agreed by 2+ makers^[1][2][3][4]
• Grade is too soft (insufficient heat resistance)Agreed by 2+ makers^[1][2][3]
• Material with low thermal conductivityOne maker^[3]
• Insufficient coolingOne maker^[1][4]

✓Fixes

Cutting conditions

• Reduce the cutting speed and feed (reduce the feed first if the edge sinks, or the speed first if the flank bulges)Agreed by 2+ makers^{[1][2][3][5][4]}

Tool

• Use a hard grade with high heat resistanceAgreed by 2+ makers^[1][2][3][5]
• Reduce heat generation with a positive geometry with a large rake angleAgreed by 2+ makers^[1][5]

Coolant

• Supply enough cutting fluidAgreed by 2+ makers^[1][3][5][4]

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