Kennametal 1113827 NR3078 KC850 Grooving Insert Carbide

Product Description

The KENNAMETAL 1113827 is a solid carbide grooving insert designed for precision external grooving and parting operations on CNC turning centers and lathes. Built to the NR insert style in the Top Notch series, it carries a KC850 grade substrate with a multilayer CVD coating of TiC, TiCN, and TiN for wear resistance and extended tool life in steel and cast iron applications. The insert features a 3.96 mm cutting width, a maximum depth of cut of 3.81 mm, and a full corner radius of 1.98 mm. Right-hand orientation and a neutral rake geometry make it a straightforward drop-in for compatible Top Notch toolholders.

This insert is suited for medium to finishing passes in grooving applications across general-purpose turning on ferrous materials. The KC850 grade with CVD coating performs well in continuous and mildly interrupted cuts on steel workpieces classified under material grades C5 and C6. It is sized to the 3078 insert size standard and is intended for use by machinists and CNC operators in job shop and production turning environments. Minimum order quantity is 5 inserts; each package contains 1 insert.

Key Features

• Solid carbide substrate, KC850 grade with multilayer CVD coating: TiC, TiCN, TiN
• 3.96 mm cutting width with a full corner radius of 1.98 mm
• Maximum depth of cut: 3.81 mm; depth of cut range: 3.00 mm to 4.00 mm
• Right-hand, neutral rake geometry for consistent chip control
• NR insert style, Top Notch series for compatibility with standard Top Notch toolholding systems
• 55-degree included angle for grooving profile geometry

Compatibility

Designed for use with Top Notch series toolholders accepting NR-style inserts, insert size 3078. Also referenced under MSC/Manufacturer Number NR3078R/L.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and locked out before seating or removing inserts. Use the correct Top Notch clamping screw and torx key for the toolholder to secure the insert without over-tightening. Confirm insert orientation and hand designation match the toolholder before initiating a cut.