Kennametal 1113909 Grooving Insert NG4189 KC850 Carbide

Product Description

The KENNAMETAL 1113909 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and parting operations on CNC lathes and turning centers. The insert carries a CVD-applied multilayer coating of TiC, TiCN, and TiN, which builds wear resistance and thermal stability across a range of cutting conditions. It is sized at NG4189 with a 4.80 mm cutting width and a maximum depth of cut of 6.35 mm. The left-hand orientation and neutral rake geometry make it a direct selection for left-hand toolholders in production turning environments. Machinists and CNC operators working in job shops or high-volume production facilities are the primary installers.

This insert is suited for grooving operations on steel and cast iron workpieces where the KC850 carbide grade performs reliably. The material grade rating of C5 and C6 positions it for general-purpose turning and finishing on ferrous materials. The Top Notch series design provides a positive seat engagement, reducing insert movement during interrupted or continuous grooving passes. A lead angle of 3 degrees and a corner radius of 0.57 mm contribute to controlled chip formation and surface finish consistency in moderate to high feed-rate applications.

Key Features

• CVD multilayer coating: TiC, TiCN, and TiN for enhanced wear and heat resistance
• 4.80 mm cutting width with a maximum depth of cut of 6.35 mm
• Left-hand orientation with neutral rake geometry
• Top Notch series insert seat size 4 for secure toolholder engagement
• Corner radius of 0.57 mm for controlled surface finish
• Material grade C5 and C6 for general-purpose ferrous machining

Compatibility

Designed for use with KENNAMETAL Top Notch series toolholders accepting insert seat size 4 and NG-style inserts. Verify toolholder hand orientation before installation.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC operator with the machine fully powered down and the spindle locked. Use the correct torque wrench and clamping screw specified for the Top Notch toolholder to seat the insert properly. Inspect the insert pocket for debris or damage before seating a new insert. Do not exceed the rated maximum depth of cut for the insert size in use.