Kennametal 1161320 SNMP432K KC850 Carbide Turning Insert

Product Description

The KENNAMETAL 1161320 is a solid carbide turning insert in the SNMP432K configuration, carrying the KC850 grade designation. It is designed for external and internal metal cutting operations on CNC and manual lathes. The insert features a multilayer CVD coating consisting of TiC, TiCN, and TiN applied over a carbide substrate, delivering a combination of wear resistance and toughness suited to interrupted and continuous cuts. The square insert geometry provides a 90-degree included angle, a 0.5-inch inscribed circle, and a corner radius of 0.03125 inches. With 8 available cutting edges and a negative rake angle, this insert is a common choice for production turning on steel and stainless steel workpieces.

This insert fits toolholders in the KENLOC series and is suited for turning, facing, and boring applications. Primary workpiece materials include steel and stainless steel, with secondary applicability to cast iron and special or super alloys. The K chip breaker geometry and honed cutting edge style make it appropriate for moderate to high material removal rates in production environments. It is typically installed by machinists and CNC operators in job shops, production facilities, and maintenance machining departments. Maximum depth of cut is 0.0492 inches (1.25 mm).

Key Features

• Multilayer CVD coating: TiC, TiCN, and TiN for wear resistance and toughness across a range of workpiece materials
• 8 cutting edges per insert for extended tool life and reduced cost per edge
• Square SNMP geometry with 90-degree included angle and negative rake for stable, rigid cutting
• K chip breaker with honed cutting edge style suited to steel and stainless steel applications
• Compatible with both clamp and pin insert holding methods
• Meets ANSI and ISO standards; ANSI code SNMP432, ISO code SNMP120408

Compatibility

Designed for use in KENLOC series toolholders that accept SNMP-style inserts. Compatible with clamp and pin holding methods. Suitable for turning, facing, and boring operations on steel, stainless steel, cast iron, and special or super alloys per material grade codes P, M, K, and S.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC operator with the machine fully powered down and in an E-stop or locked-out state. Ensure the toolholder pocket and seating surfaces are clean and free of chips before seating the insert. Use the correct torque wrench and clamp screw specified by the toolholder manufacturer — do not improvise fasteners or exceed the recommended clamping force. Inspect the insert seat and chip breaker orientation before resuming cutting operations.