Grooving tool.
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Front side -clearance wear(150x, polarised)
Grooving tool; typical clearance wear due to the tight relief angles.
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Grooving tool (800x, nomarski)+(800x, nomarski)
Extreme form wear + crater wear on very small grooving tool.
Application: grooving lines at 200 periods per mm, turned on Hembrug lathe.
