Workpiece material welds to the cutting edge

?Likely causes

• Cutting speed is lowAgreed by 2+ makers^[1][2][3]
• High affinity between the tool grade and the workpiece materialAgreed by 2+ makers^[4][2][5]
• Soft materials (aluminum, copper, mild steel) or stainless steelAgreed by 2+ makers^[6][4][7]
• Dry cutting or insufficient cutting fluidAgreed by 2+ makers^[2][1][8]
• Small rake angle or negative geometryAgreed by 2+ makers^[2][6]
• Chemical reaction or softening of the workpiece material due to cutting heatOne maker^[1]

✓Fixes

Cutting conditions

• Increase the cutting speedAgreed by 2+ makers^{[4][1][2][5][3]}
• Increase the feedAgreed by 2+ makers^[3][5]

Tool

• Use a grade with low affinity, such as a coated grade or cermetAgreed by 2+ makers^[1][2][5][6]
• Use a larger rake angle and smaller honingAgreed by 2+ makers^[2][5][6]
• For aluminum, use a larger clearance angle than for steel and a tool with a mirror-finished rake faceOne maker^[4]

Coolant

• Use cutting fluid or increase the supply (non-water-soluble, wet cutting)Agreed by 2+ makers^[1][2][3][5]

▦Notes by material

• Aluminum alloy: Elastic deformation causes welding on the flank as well^[4]

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