Iscar 6403302 Threading Insert IC908 Carbide 1.25mm 20 Tpi

Product Description

The ISCAR 6403302 is a carbide threading insert designed for external thread cutting operations on CNC lathes and turning centers. Manufactured in the TIP style with an IC908 grade carbide substrate and a PVD coating process, this insert delivers consistent thread form accuracy on a range of ferrous and non-ferrous workpiece materials. The partial profile 60-degree thread standard covers both metric and unified thread forms at a 1.25 mm pitch (20 TPI). The MT chipbreaker geometry and Cut Grip series designation make it suited for finishing and semi-finishing passes where chip control and surface finish are priorities for machining professionals.

This insert is intended for external threading applications in production and job-shop turning environments. The 4 mm cutting tip width and 0.15 mm corner radius suit fine-pitch threading on smaller diameter workpieces. Typical users include CNC machinists, tool-and-die shops, and contract manufacturers working to ISO 13399 tooling standards. It is compatible with ISCAR Cut Grip series toolholders designed to accept TIP-style threading inserts in size 4.

Key Features

• IC908 carbide grade with PVD coating for extended wear resistance on steel and cast iron (material grades C1, C2, C6, C7)
• Partial profile 60-degree included angle covers metric and unified external thread forms
• 1.25 mm pitch (20 TPI) for consistent thread geometry on fine-pitch applications
• 0.15 mm (0.0059 inch) corner radius for accurate thread root profile
• MT chipbreaker designed for reliable chip evacuation during threading passes
• Compliant with ISO 13399 cutting tool data representation standard

Compatibility

Designed for use with ISCAR Cut Grip series toolholders that accept TIP-style threading inserts in size 4. Consult the ISCAR toolholder selection guide to confirm holder compatibility before ordering.

Installation Notes

Threading inserts should be installed by a qualified machinist with the machine spindle fully stopped and energy isolated per facility lockout/tagout procedures. Seat the insert firmly in the toolholder pocket and verify torque on the clamping screw per the toolholder manufacturer specification before initiating any cutting pass. Inspect the insert seating surface and pocket for chips or debris before installation, as contamination can affect thread form accuracy. Minimum order quantity for this insert is 10 pieces.