Sandvik Coromant 6427380 Cutoff Insert 3mm Corocut Qd

Product Description

The SANDVIK COROMANT 6427380 is a solid carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. Built to the CoroCut QD series standard, it features a 3 mm cutting width (0.1181 inches), a neutral lead angle of 0 degrees, and a 7-degree relief angle. The insert uses a clamp-style holding method and carries a TiCrAlN and TiAlN PVD coating applied over a 1125 carbide grade substrate. The CO chipbreaker geometry controls chip formation during interrupted or continuous cutoff passes. This insert is installed by CNC machinists and tool-and-die professionals working with turning equipment in production or job-shop environments.

This insert is suited for cutoff and deep-grooving applications where controlled chip evacuation and edge stability are required. The G-seat size and QD insert style are matched to compatible CoroCut QD toolholders. With an overall length of 10 mm (0.3937 inches) and an overall width of 3 mm (0.1181 inches), the insert fits standard G-size seats in the QD system. The 0.10 mm (0.0039 inch) corner radius limits edge stress at the cutting corner during parting operations on ferrous and non-ferrous workpieces.

Key Features

• 3 mm cutting width (0.1181 inches) for precise parting and grooving cuts
• Solid carbide construction with 1125 grade substrate for wear resistance
• TiCrAlN and TiAlN PVD dual-layer coating for thermal and abrasion resistance
• CO chipbreaker geometry for controlled chip formation during cutoff operations
• Neutral lead angle and neutral hand — compatible with straight plunge applications
• 7-degree relief angle reduces flank wear on the trailing edge

Compatibility

Designed as an OEM-style replacement insert for CoroCut QD series toolholders accepting G-seat size inserts with a QD insert style designation.

Installation Notes

This insert is installed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and clamp screw specified for the CoroCut QD toolholder to secure the insert — do not overtighten by hand. Inspect the insert seat for chips or debris before seating the new insert to ensure proper contact and repeatable tool-nose position.