Kennametal 1161159 Turning Insert DNMP431 K68 Carbide

Product Description

The KENNAMETAL 1161159 is a solid carbide, uncoated turning insert in the ANSI DNMP431 style, part of the KENLOC series. The 55-degree diamond (rhombic) shape provides a sharp, defined cutting geometry suited for precision material removal. With a 0.5-inch inscribed circle, a 0.1875-inch thickness, and a corner radius of 0.0156 inches, this insert is sized for stable, rigid toolholding setups. The K68 grade delivers high wear resistance balanced with toughness, making it well suited for stainless steel, cast iron, aluminum, and non-ferrous metal applications. The uncoated, honed cutting edge and negative rake geometry are engineered for consistent performance across medium machining operations in these material families.

This insert is designed for CNC and manual turning centers used in production and job-shop environments. Applicable operations include turning, facing, boring, back turning, and back boring. The DNMP431 geometry with negative side clearance and a clamp-and-pin holding method suits toolholders designed for DNMP-style inserts. The K68 grade characteristics make it particularly effective when machining stainless steel, cast iron, aluminum, and non-ferrous metals where consistent edge life and controlled wear progression are required. It is installed by machinists and CNC operators working to ANSI and ISO tooling standards.

Key Features

• ANSI insert code DNMP431 and ISO insert code DNMP150404 for cross-standard toolholder compatibility
• K68 grade with high wear resistance and moderate toughness for stainless steel, cast iron, and non-ferrous materials
• 55-degree diamond (rhombic) insert shape with 4 cutting edges, maximizing usable insert life per piece
• Uncoated, honed cutting edge with negative rake geometry for clean, controlled cuts in medium machining
• Maximum depth of cut of 0.0492 inches (1.25 mm), suitable for finish to semi-finish passes
• Multi-use capable: turning, facing, boring, back turning, and back boring from a single insert style

Compatibility

Designed for use in DNMP-style KENLOC toolholders and compatible clamp-and-pin insert seats that accept a 0.5-inch inscribed circle, 55-degree diamond insert with negative side clearance. Conforms to ANSI and ISO insert standards.

Installation Notes

Installation is performed by machinists or CNC operators following standard insert indexing procedures. Power down and fully stop the spindle before indexing or replacing the insert. Seat the insert firmly in the toolholder pocket and confirm the clamp and pin are fully engaged before resuming cuts. Do not exceed the rated maximum depth of cut for this insert geometry.