Page 98 - Industrial Tools Catalog (1)

Drilling tools with indexable inserts \ Processing and machining technology - Indexable insert drilling

troubleshooting indexable insert drilling

wear to open space

wear to open space is the preferred type of wear, if it is even.
problem
ƒ cutting speed too high
ƒ oil content in coolant too low
ƒ too little cooling
ƒ concentricity error
countermeasures
ƒ lower cutting speed
ƒ increase oil content in coolant
ƒ increase coolant quantity
ƒ check concentricity
plastic deformation
problem
ƒ cutting speed too high
ƒ feed rate too high
ƒ too little cooling
countermeasure
ƒ reduce cutting speed
ƒ reduce feed rate
ƒ increase cooling
breakouts

problem
ƒ tip angles do not match
ƒ unstable conditions
ƒ concentricity error
ƒ feed rate too high
ƒ too little cooling
countermeasure
ƒ check tip angle
ƒ check clamping
ƒ check concentricity
ƒ reduce feed rate
ƒ increase cooling

built-up edge
problem
ƒ cutting speed too high/too low
ƒ oil content of coolant too low
countermeasure
ƒ increase cutting speed so that the built-up edge moves to the centre
ƒ decrease cutting speed so that the built-up edge moves to the outer edge or is avoided
ƒ increase coolant oil content

Source: Hahn+Kolb Werkzeuge GmbH
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