Tungaloy 6991279 Grooving Insert AH725 Solid Carbide

Product Description

The TUNGALOY 6991279 is a solid carbide grooving insert in the EasyMcut series, designed for external grooving and parting operations on CNC lathes and turning centers. It carries the ISO designation ETX4-040 and is finished with a TiAlN coating applied via PVD process, providing thermal resistance and extended tool life in demanding cutting environments. The insert has a cutting width of 0.157 inches (4.00 mm) and a corner radius of 0.016 inches (0.40 mm). It is screw-held and configured for right-hand cutting. Machinists and CNC tooling technicians install this insert in compatible EasyMcut toolholders for high-repeatability grooving work on steel and stainless steel components.

This insert is suited for grooving operations on stainless steel and carbon steel as primary workpiece materials, with secondary application on cast iron. The AH725 grade combined with TiAlN coating makes it appropriate for both wet and dry cutting conditions where edge wear resistance is a priority. It fits production turning environments in job shops and manufacturing facilities where consistent groove geometry and tight tolerances are required. The screw-clamping method supports fast insert indexing without disturbing the toolholder setup.

Key Features

• Solid carbide construction with PVD TiAlN coating for wear and heat resistance
• Cutting width of 0.157 inches (4.00 mm) for precise groove sizing
• Corner radius of 0.016 inches (0.40 mm) for controlled corner geometry
• Right-hand configuration with screw-holding method for secure, repeatable seating
• Multi-use capable insert per manufacturer designation
• Conforms to ISO 13399 tooling data standards for system integration

Compatibility

Designed for use in EasyMcut series grooving toolholders that accept the ETX4-040 insert style and size code 4-040. Compatible primary workpiece materials are stainless steel and carbon steel (ISO material codes M and P); secondary compatibility includes cast iron (ISO material code K).

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. The machine spindle must be fully stopped and the turret or toolpost locked before seating or removing the insert. Use the manufacturer-specified torx or hex key to tighten the clamping screw - do not overtighten or substitute fasteners. Inspect the insert pocket and seating surface for chips or debris before each insert change to ensure accurate positioning and prevent insert rocking.