Technical Information
Solid Carbide Drill Failure Mode and Solutions
Failures
Picture
Analysis
Solution
Flank wear
● Reduce cutting speed ● Raise feed rate ● Raise coolant flow (e.g. raise coolant pressure)
● Abrasion between the work piece and the flank surface leads to flank wear.
Built-up edge
● The work piece material stick on the cutting edge leads to built-up edge.
● Raise cutting speed ● Raise coolant flow (e.g. raise coolant pressure)
Material bonding on the front face along the cutting edge
Fracture
● Perpendicular cracks along the edges, chip eroding, vibration and extremely high wear resistance lead to fractures.
● Replace and recondition the tool sooner ● Improve stability (work piece/tool)
Chipping along the cutting edge
Plastic deformation
● Reduce cutting speed ● Raise coolant flow (e.g. raise coolant pressure)
● High heat and mechanical stress cause plastic deformation.
Deformation of the cutting edge (especially on the cross edge and the radius of the nose)
Crater wear
● Tool Material is too soft. ● Too high cutting speed. ● Too high feed rate.
● Choose more wear resistant grade ● Reduce cutting speed ● Reduce feed ● Raise coolant pressure
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