Kennametal 5531898 DNMG431FN KCK15B Turning Insert

Product Description

The KENNAMETAL 5531898 is a DNMG431FN turning insert in grade KCK15B, designed for high-productivity metal cutting on CNC lathes and turning centers. The insert features a multilayer CVD coating stack of TiCN, Al2O3, and TiOCN applied via MTCVD process, delivering wear resistance and thermal stability during continuous and interrupted cuts. The 55-degree diamond shape provides a strong cutting geometry with a negative rake angle of 10 degrees and a honed cutting edge for controlled entry. With a 0.5-inch inscribed circle and a corner radius of 0.0156 inches (1/64 inch), this insert suits medium to finishing passes. It is part of the KENLOC series and carries both ANSI and ISO standards compliance.

This insert is engineered for turning, facing, boring, back turning, and back boring operations on steel and cast iron workpieces, corresponding to ISO material groups P and K. The FN chip breaker geometry supports stable chip control across a range of feed rates and depths of cut up to 0.100 inches (2.54 mm). Typical users include CNC machinists and turning specialists working in job shops, production machining, and maintenance environments. The insert is sold individually with a minimum order quantity of 5 units per purchase.

Key Features

• Multilayer CVD coating: TiCN, Al2O3, and TiOCN via MTCVD process for extended tool life on steel and cast iron
• DNMG 55-degree diamond insert shape with negative rake provides strong, stable cutting geometry
• FN chip breaker design for reliable chip control in turning, facing, and boring operations
• Honed cutting edge style reduces microchipping and supports consistent surface finish
• 4 usable cutting edges per insert for cost efficiency
• Clamp and pin holding method compatible with standard KENLOC toolholders

Compatibility

Designed for use in KENLOC series toolholders accepting DNMG style inserts. Conforms to ANSI and ISO standards under industry designation DNMG431FN and ISO code DNMG150404FN. Suitable for material grades C3 and C4.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before seating or indexing the insert. Ensure the insert pocket and seating surfaces are clean and free of chips before clamping. Follow the toolholder manufacturer torque guidelines for the clamp screw to prevent insert movement or seat damage during cutting.