Sumitomo 18RBALM Grooving Insert GCMN4002GG AC830P Gnd

Product Description

The SUMITOMO 18RBALM is a solid carbide grooving insert in the GND series, engineered for precision grooving and parting operations on CNC lathes and turning centers. Carrying the GCMN4002GG insert style with an AC830P CVD coating, this insert delivers a 4.00 mm cutting width and a maximum depth of cut of 25.40 mm (1.0000 inch). The positive rake angle of 5 degrees combined with a double-ended design extends usable tool life. Machinists and toolroom professionals install this insert into compatible grooving toolholders for demanding applications on stainless steel and carbon steel workpieces.

This insert is suited for external grooving, profiling, and parting operations in both production and job-shop environments. Its primary workpiece materials are stainless steel (ISO material code M) and steel (ISO material code P), making it a practical choice for aerospace, medical, automotive, and general metalworking applications where tight groove tolerances and surface finish consistency are required. The GG chip breaker geometry assists in chip control during continuous or interrupted cuts at moderate to high feed rates.

Key Features

• 4.00 mm cutting width with 25.40 mm maximum depth of cut for deep grooving capability
• AC830P CVD coating for extended wear resistance on steel and stainless steel
• Positive rake angle (5 degrees) reduces cutting forces and heat generation
• Double-ended insert design provides two usable cutting edges per insert
• GG chip breaker geometry promotes effective chip evacuation
• Corner radius of 0.20 mm (0.0079 inch) for controlled edge definition

Compatibility

Designed for use in GND series grooving toolholders accepting GCMN 4002-style inserts with a seat size 4. Conforms to ANSI code GCMN4002-GG and ISO 13399 standards.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine in a locked-out, zero-energy state before insert indexing or replacement. Use a calibrated torque screwdriver appropriate for the toolholder seat to secure the insert clamp without over-torquing. Inspect the insert pocket and clamping components for wear or debris before seating the new insert. Follow the toolholder manufacturer's clamping specifications and verify insert seating before resuming operations.