Iscar 6405239 Grooving Insert IC8250 3.18mm Cut Width

Product Description

The ISCAR 6405239 is a solid carbide double-ended grooving insert from the Cut-Grip series, designed for precision grooving, parting, and profiling operations on CNC lathes and turning centers. Manufactured under grade IC8250 with a CVD-applied Al2O3 coating, this insert delivers strong wear resistance at elevated cutting temperatures. The neutral hand orientation and self-grip holding method make it a direct drop-in for compatible Cut-Grip toolholders. With a cutting width of 3.18 mm (0.1250 inches) and a maximum depth of cut of 12.19 mm (0.4800 inches), it is well suited for medium-depth grooving work on both external and internal applications.

This insert is intended for use in production turning environments where consistent groove width and surface finish are critical. The IC8250 grade is optimized for stainless steel and steel workpieces, where CVD alumina coatings help manage heat and extend tool life. A positive rake angle of 7 degrees supports controlled chip formation and reduces cutting forces. The double-end design provides two usable cutting edges per insert, which lowers per-edge tooling cost in high-cycle production settings. Machining professionals and CNC tooling technicians working in job shops, aerospace, and general manufacturing will find this insert appropriate for their grooving and parting operations.

Key Features

• IC8250 grade with CVD Al2O3 coating for wear resistance on stainless steel and steel
• Double-end design delivers two usable cutting edges per insert
• 3.18 mm cutting width with a 12.19 mm maximum depth of cut
• Positive rake angle of 7 degrees for reduced cutting forces and controlled chip flow
• Self-grip insert holding method for secure, repeatable seating in Cut-Grip toolholders
• Chip breaker style P supports chip control across the stated depth-of-cut range

Compatibility

Designed as an OEM-style replacement insert for ISCAR Cut-Grip series toolholders accepting GIP-style inserts with insert size code 318159. Conforms to ISO 13399 standards and carries the manufacturers catalog designation GIP 3.18-1.59.

Installation Notes

This insert is installed and changed by CNC machinists or tooling technicians; always index the machine spindle to a safe stop and disable the machine before handling cutting inserts. Use the appropriate ISCAR torx or clamping key for the self-grip holder to ensure proper seating without over-torquing the clamping mechanism. Inspect the insert pocket for chips or wear before seating a new insert, as debris in the pocket can cause premature edge failure or dimensional variation. Dispose of worn carbide inserts according to applicable shop safety and environmental regulations.