Flank wear

Abrasive wear due to carbides,speed,hard skin

* Wear on Clearance Face
* Fast wear on Clearance face results in poor surface quality
* High cutting speed
* Low feed
* Bad wear-resistance

* Reduce cutting speed
* Gradually increase feed
* Use inserts with better wear
* resistant material or coating
* Increase cooling fluid supply
* Clockwise milling

Crater wear

Diffusion between insert and work piece material

* Crater Wear on rake face
* Excessive crater wear reduces strength of cutting edge

Excessive cutting temperature on the rake face causes diffusion wear

* Reduce cutting speed
* Reduce feed
* Use inserts with positive rake angle,more duranle material or cotaing.
* Avoid built-up egde

Flank wear

Abrasive wear due to carbides,speed,hard skin

* Wear on Clearance Face
* Fast wear on Clearance face results in poor surface quality
* High cutting speed
* Low feed
* Bad wear-resistance

* Reduce cutting speed
* Gradually increase feed
* Use inserts with better wear
* resistant material or coating
* Increase cooling fluid supply
* Clockwise milling

Crater wear

Diffusion between insert and work piece material

* Crater Wear on rake face
* Excessive crater wear reduces strength of cutting edge

Excessive cutting temperature on the rake face causes diffusion wear

* Reduce cutting speed
* Reduce feed
* Use inserts with positive rake angle,more duranle material or cotaing.
* Avoid built-up egde

Chipping

Application too demanding for the chosen insert

* Built-Up Egde
* Grade is too brittle
* Inserts Chipbreaker strength is low

Excessive cutting temperature on the rake face causes diffusion wear

* Cutting edge been cracked,then to increase cutting speed
* Eliminate vibration factors
* Uneven workpiece material,then to reduce cutting speed and increase feed,Clockwise milling.
* Whether insert body is annealed, the shim is broken, or the blade screw needs to be replaced.
* Use higher strength inserts material
* Change inserts with strong edge
* Chilled cast iron workpiece requires negative rake angle inserts
* Milling tools with round inserts are with best impact resistance

Plastic deformation

Substantial heat and pressure

* Plastic Deformation
* The cutting edge collapses or clearance face recessed, resulting in poor cutting control and surface quality. The flank wear would cause inserts breakage

Too high cutting temperature and pressure

* Choose a harder grade with higher resistance to plastic deformation
* Cutting edge collapses: Reduce cutting speed
* Clearance face recessed: reduce feed

Built-up edge

Work piece material welded to the cutting edge

* Built-up Edge
* Built -up edge results in poor surface quality,when falling down,it would cause breakage of cutting egde

Low speed cutting with negative rake angle

* Increase cutting speed
* Gradually increase feed to the optimum chip breaking thickness
* Use CVD Coating Inserts
* Adequate high pressure coolant fluid or air to prevent secondary chip breaking
* Clockwise milling
* Positive rake agnle tool and inserts

Notch wear

Oxidation at the depth of cut

* Notch Wear
* Notch wear results in poor surface quality and breakage

* Increase cutting speed
* Gradually increase feed to the optimum chip breaking thickness
* Use CVD Coating Inserts
* Adequate high pressure coolant fluid or air to prevent secondary chip breaking
* Clockwise milling
* Positive rake agnle tool and inserts