Sandvik Coromant 5908879 Turning Insert CNGG431-SGF H13A

Product Description

The SANDVIK COROMANT 5908879 is a solid carbide, uncoated turning insert in the T-Max P series, designed for precision metal cutting in demanding machining applications. Carrying the CNGG431-SGF H13A designation, this insert features an 80-degree diamond shape (insert shape code C), a neutral hand orientation, and an SGF chip breaker geometry. The 1/2-inch inscribed circle and 1/64-inch (0.0156 inch) corner radius make it well suited for finishing and light-to-medium turning passes. The H13A carbide grade is engineered for stability and edge retention when working difficult-to-machine materials. Licensed machinists and CNC operators install this insert as a standard indexable tooling component.

This insert is intended primarily for turning stainless steel (ISO material code M) and is rated for secondary application on superalloys and titanium (ISO material code S). It fits standard CNGG-style toolholders and is appropriate for CNC lathes and turning centers in both job shop and production environments. With four cutting edges per insert, it provides multiple index positions before replacement. The T-Max P series is a recognized platform for general and specialty turning operations where consistent surface finish and tool life are priorities.

Key Features

• Solid carbide H13A grade — uncoated, bright finish for low-friction edge performance on stainless steel and superalloys
• 80-degree diamond insert shape (code C) with SGF chip breaker geometry for controlled chip formation
• 1/2-inch (12.70 mm) inscribed circle with 1/64-inch (0.0156 inch) corner radius for finishing-range tolerances
• Neutral hand orientation — compatible with both left- and right-hand toolholder setups
• Four indexable cutting edges per insert for extended tooling value
• Clamp and pin holding method for secure seating in CNGG-style pockets

Compatibility

Designed for use in CNGG-style indexable turning toolholders that accept a 1/2-inch inscribed circle insert with a 0.2030-inch hole diameter and clamp-plus-pin retention. ISO code CNGG120404-SGF H13A. Verify toolholder pocket geometry and insert seat specifications before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified clamping hardware for the toolholder system — do not overtighten the clamp screw, as this can fracture the carbide insert. Inspect the insert pocket and seating surfaces for chips or debris before seating the new insert.