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Milling inserts and grades for steel

Find your CVD- and PVD-coated carbide grades and uncoated cermets optimized for steel.

Performance: CoroMill® 390 with size 07 inserts

​To achieve acceptable component quality, maximum cutting depth was restricted in this application. After switching to CoroMill 390 cutter with size 07 inserts, the cutting depth could be increased, generating higher productivity. With GC1130 inserts the tool life was improved by 47%, significantly reducing cost per component. 

 

+47%

 tool life
 

ComponentDie and mould
Workpiece materialP2.5.Z.HT
OperationSlot and pocket milling
GC1130Existing solution
​ToolR390-012A12-07M
Insert​390R-070204M-PM 1130
zn 3​3
n rpm4005​3979
vc m/min (ft/min)151 (495)​150 (492)
vf mm/min (in/min)853 (33.583)​900 (35.433)
fz mm (inch)0.07 (0.003)​0.075 (0.003)
ap mm (inch)1.5 (0.059)​1 (0.039)
ae mm (inch)12 (0.472)​12 (0.472)
ResultTool life 44 minutes​Tool life 30 minutes

Performance: Slot and shoulder milling with long overhang

​Unstable conditions with long overhang, combined with a forged surface and coolant were causing some challenges for the insert tool life in this application. Surface quality issues, caused by flaking of the coating, set the limitation on insert tool life. By exchanging the existing solution with GC1130 inserts, flaking was significantly reduced and 57% more components could be machined. 

 

+57%

tool life
 

Component Rear spindle
Workpiece material P2.5.Z.HT
Operation Slot and shoulder milling
GC1130 Existing solution
Tool ​R390-020A20-11M
Insert ​R390-11 T3 08M-PM 1130
zn 3​3
n rpm2400​2400
vc m/min (ft/min)151 (495)​151 (495)
vf mm/min (in/min)864 (34.016)​864 (34.016)
fz mm (inch)0.12 (0.005)​0.12 (0.005)
ap mm (inch)3.5 (0.138)​3.5 (0.138)
ae mm (inch)20 (0.787)​20 (0.787)
Result Tool life 440 components ​Tool life 280 components

Performance: Shoulder milling in unalloyed steel

​Thermal cracks and flaking were causing short insert tool life. Inserts in grade GC1130 were introduced to tackle the problem. Conducted tests have shown that these inserts lasted much longer with a lot less wear than the existing solution, resulting in reduced costs and improved security.


Improved

security

Component Plate, General Engineering
Workpiece material P1.1.Z.AN
Operation Shoulder milling
​GC1130 Existing solution
Tool ​490-044C4-08H
Insert ​490R-08T308M-PM 1130
zn 6​6
n rpm1912​1912
vc m/min (ft/min)264 (866)​264 (866)
vf mm/min (in/min)1722 (67.795)​1722 (67.795)
fz mm (inch)0.15 (0.006)​0.15 (0.006)
ap mm (inch)1.5 (0.059)​1.5 (0.059)
ae mm (inch)22 (0.866)​22 (0.866)
Result Not worn out after 42 minutes ​Tool life 42 minutes

Performance: Face milling of connecting rod

​In this application the currently used insert was worn out after 27 minutes. Thermal cracks and chipping of the insert caused bad surface quality and could result in potential insert breakage. In order to tackle the challenge, GC1130 inserts were tested, reaching 100% longer tool life and improved production economy. 

 

+47%

tool life
 

Component Connecting rod
Workpiece material P2.2.Z.AN
Operation Face milling
​GC1130 Existing solution
Tool ​R390-032A32-17L
Insert ​R390-17 04 31M-PM 1130
zn 2​2
n rpm2636​2636
vc m/min (ft/min)265 (869)​265 (869)
vf mm/min (in/min)791 (31.142)​791 (31.142)
fz mm (inch)0.15 (0.006)​0.15 (0.006)
ap mm (inch)5 (0.197)​5 (0.197)
ae mm (inch)26 (1.024)​26 (1.024)
Result Worn out after 54 minutes ​Worn out after 27 minutes

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