Kennametal 7090559 Dnmg Turning Insert Altin Carbide

Product Description

The KENNAMETAL 7090559 is a DNMG-style carbide turning insert designed for precision external turning operations on CNC lathes and turning centers. Built to a diamond insert shape with a 55-degree included angle and a 0.004 inch (0.10 mm) corner radius, this insert delivers sharp, controlled cuts suited for finishing and semi-finishing applications. The substrate is solid carbide in the KCU10B grade, coated with an AlTiN (aluminum titanium nitride) finish for improved heat resistance and extended tool life. It carries a neutral hand orientation, making it compatible with both right- and left-hand toolholders in standard DNMG seating arrangements. Machinists and CNC operators in job shop and production environments are the primary users.

This insert is suited for turning ferrous and non-ferrous materials in applications that demand tight tolerances and consistent surface finish. The MS chip breaker geometry supports controlled chip formation across a range of feed rates and depths of cut. The 0.004 inch corner radius makes this insert appropriate for fine finishing passes where minimizing corner stress and maintaining dimensional accuracy are priorities. It is sold individually per package with a minimum order quantity of five pieces.

Key Features

• DNMG insert style with 55-degree diamond shape for sharp, efficient cutting geometry
• AlTiN coating provides thermal resistance and wear protection in high-speed turning
• KCU10B carbide grade engineered for performance in finishing and semi-finishing cuts
• MS chip breaker promotes reliable chip control across varied feed and depth conditions
• 0.004 inch (0.10 mm) corner radius suited for tight-tolerance finishing passes
• Neutral hand insert fits standard DNMG toolholders without handedness restriction
• Four cutting edges per insert maximizes cost efficiency per piece

Compatibility

Designed for use in standard DNMG-style toolholders. Verify toolholder seating geometry, clamping style, and inscribed circle compatibility before installation. No specific model or system compatibility was provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine in a full stop, spindle off, and control in an e-stop or locked-out state. Use the correct DNMG torx or hex key to seat and torque the clamping screw per the toolholder manufacturer specification. Inspect the insert pocket and seating surface for chips or debris before seating the insert. Index to a fresh cutting edge rather than continuing on a worn edge to prevent toolholder damage.