Rough/Poor Finish on Workpiece Surface

Problem Description:There are knife marks, chatter marks, streaks or sticky residue on the processed surface.

Possible causes:

  • Insufficient cutting speed or incorrect tool rake angle
  • Poor coating or tool tip wear leading to drag cutting
  • Hard spots on the surface of the material being processed or tool resonance

Solution:

  • Use mirror-finished tools, control cutting depth and feed rate (low feed, high speed)
  • Install a tool damper to reduce vibration and control the coolant flow
  • If the surface roughness is poor, add fine lanes or perform mirror grinding.
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