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An extremely tough material and CVD coating combine to achieve excellent fracture and wear resistance
Achieve long tool life even at a low cutting speed range (Vc = 300m/min) due to the CVD coating
Features:
The combination of an extremely tough grade with a CVD coating achieves excellent fracture resistance and wear resistance
Lighter edge preparations reduce tool pressure
Excellent for finishing operations
Tooling application
- Ductile / Gray cast iron
- Turning/Milling
Cutting conditions
| Grade | Material | Operation type | Machining | Cutting speed (m/min) | Feed (mm/rev – mm/t) | DOC(mm) | Coolant |
| GP90 | Gray cast iron | Turning | Turning Roughing ~ Finishing | 370 – 820 | 0.3 – 0.6 | -3.5 | DRY |
| Ductile cast iron | 250 – 550 | 0.15 – 0.40 | -3.0 | DRY | |||
| Gray cast iron | Milling | Milling Roughing ~ Semi-Finishing | 370 – 760 | 0.07 – 0.25 | -6.0 | DRY | |
| Ductile cast iron | 400 – 800 |
Grade | Material | Operation type | Machining | Cutting speed (m/min) | Feed (mm/t – mm/rev) | DOC(mm) | Coolant |
GX90 | Gray cast iron | Turning | Turning Roughing | 370 – 820 | 0.3 – 0.6 | -3.5 | DRY |
Ductile cast iron | Finishing | 250 – 550 | 0.15 – 0.40 | -3.0 | |||
Gray cast iron | Milling | Milling Roughing | 370 – 760 | 0.07 – 0.25 | -6.0 | DRY | |
Ductile cast iron | Semi-Finishing | 400 – 800 |
Gray cast iron rough turning application
Gray cast iron milling application
Case study
Differential case
| Material | Ductile cast iron with scale |
| Cutting speed | 460 m/min (GP90) 200 m/min (CVD coated carbide) |
| Feed | 0.35 mm/rev |
| DOC | 1.5 mm |
| Coolant | WET |
| GP90 | C/T 30 seconds / part |
| Competitor’s CVD coated carbide | C/T 60 seconds / part |
GP90 machined at a higher speed than the competitor’s CVD coated carbide and reduced cutting time by 50%.
Auto parts
| Material | Ductile cast iron with scale |
| Cutting speed | 610 m/mm |
Feed Feed | 0.1 mm/t 1800 mm/m |
| DOC | 2mm/rev × 3 PASSES |
| Coolant | DRY |
| GP90 | 1,300 pcs/ corner |
| Competitor’s silicon nitride ceramic | 800 pcs/ corner |
GP90 achieved 1.6 X higher tool life than the competitor’s ceramic.