Sumitomo 1934374 Turning Insert VNMG331EUP G10E Carbide

Product Description

The SUMITOMO 1934374 is a solid carbide turning insert in the VNMG style, designed for precision metal-cutting operations on CNC lathes and turning centers. Carrying the G10E uncoated carbide grade, this insert operates with a positive rake geometry and a 10-degree rake angle, making it well suited for finishing and light interrupted cuts. The 35-degree diamond shape (Insert Shape Code V) concentrates cutting force on a narrow tip for accurate profiling. With a 1/64 inch corner radius and a 3/8 inch inscribed circle, it delivers clean surface finishes in tight-tolerance applications. Machinists and tool-and-die professionals install this insert as a direct OEM-grade replacement in compatible turning toolholders.

This insert is primarily intended for turning cast iron workpieces, corresponding to material grade K and material grade designation C2. It is used in both production turning and job-shop environments where an uncoated carbide grade outperforms coated alternatives — particularly in abrasive, short-chip cast iron cuts where coating adhesion or thermal buildup is a concern. The EUP chip breaker geometry controls chip flow during finishing passes. Insert holding is achieved via clamp and pin methods standard to VNMG-compatible toolholders. The neutral hand orientation allows use in both standard and back-turning configurations.

Key Features

• Solid carbide G10E uncoated grade optimized for cast iron (K-class) turning
• 35-degree diamond insert shape with positive rake for reduced cutting forces
• EUP chip breaker geometry for controlled chip evacuation during finishing
• 1/64 inch corner radius for fine surface finish and tight-tolerance profiling
• Neutral hand orientation supports standard and back-turning setups
• Conforms to ANSI code VNMG331EUP and ISO 13399 code VNMG160404N-UP

Compatibility

Designed as an OEM-style replacement turning insert for VNMG-style toolholders accepting a 3/8 inch inscribed circle insert with clamp and pin holding. Consult your toolholder documentation to confirm VNMG331 seat compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or tooling technicians with the machine in a locked-out, zero-energy state per applicable lockout/tagout procedures. Confirm that the toolholder seat and clamp are free of chips and debris before seating the insert. Tighten the clamp to toolholder manufacturer specifications — do not substitute torque values from memory or unrelated documentation. Dispose of worn inserts in accordance with local regulations for carbide tooling waste.