Iscar 6404168 Grooving Insert GITM400K020K IB20H Cbn

Product Description

The ISCAR 6404168 is a cubic boron nitride (CBN) grooving insert carrying the manufacturer designation GITM400K020K in grade IB20H. Designed for the Cut-Grip series, this insert delivers a 4.00 mm (0.1575 inch) cutting width with a maximum depth of cut of 0.40 mm (0.0157 inch). The uncoated, bright-finish CBN substrate is engineered specifically for machining hard materials, making it appropriate for hardened steels, cast irons, and similar difficult-to-cut workpieces. The neutral hand orientation and positive rake geometry with a 7-degree rake angle reduce cutting forces and promote clean chip evacuation. A K-style chip breaker is integrated into the insert geometry. Installation is performed via clamp-style insert holding. Machinists and CNC turning specialists are the primary installers of this insert type.

This grooving insert is intended for hard-material turning applications where tight groove dimensions and surface finish consistency are critical. The 0.20 mm (0.0080 inch) corner radius and 30-degree lead angle support precision external grooving and parting operations on hardened workpieces. The Cut-Grip series tooling system this insert belongs to is a dedicated grooving platform used on CNC lathes and turning centers in production and job-shop environments. The GITM insert style and 400K020 size code identify the correct toolholder pocket geometry required for proper seating.

Key Features

• CBN (cubic boron nitride) uncoated substrate rated for hard-material (H-code) workpieces
• 4.00 mm cutting width with a maximum depth of cut up to 0.40 mm per pass
• Positive rake geometry with 7-degree rake angle reduces cutting forces on hardened materials
• K-style chip breaker for controlled chip formation in tight-tolerance grooving
• 0.20 mm corner radius supports precise groove profiles
• Clamp-style insert holding for secure, repeatable seating in compatible Cut-Grip toolholders
• Compliant with ISO 13399 insert identification standards

Compatibility

Designed for use in ISCAR Cut-Grip series toolholders that accept GITM-style inserts with the 400K020 size code. Verify toolholder pocket specification against the GITM insert style and size code before ordering.

Installation Notes

Installation and replacement of grooving inserts should be performed by a qualified machinist or CNC tooling technician with the machine in a full stop, de-energized, and locked-out state per applicable lockout/tagout procedures. Use the appropriate torx or hex key to release and reseat the clamp to the toolholder manufacturer torque specification. Inspect the insert pocket and clamp for debris or wear before seating the new insert. CBN inserts are brittle and should not be dropped or subjected to impact during handling.