Kennametal 1112978 NR3062 KC730 Grooving Insert Tin Carbide

Product Description

The KENNAMETAL 1112978 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and parting operations on CNC lathes and turning centers. This left-hand insert carries the NR3062 style designation and is manufactured to the KC730 grade, a PVD-coated carbide with a TiN finish engineered for improved wear resistance and tool life in turning applications. The cutting width is 3.18 mm (0.1252 inches) with a maximum depth of cut of 3.81 mm (0.1500 inches). The full-radius geometry and neutral rake provide controlled chip formation across a range of workpiece materials.

This insert is suited for external grooving, undercutting, and groove-turning operations on ferrous and non-ferrous materials classified under material grades C2, C3, and C4. The 55-degree included angle and 1.59 mm (0.0626 inch) corner radius make it appropriate for finish and semi-finish grooving passes in moderate to high-volume production environments. It is installed by machinists and CNC turning specialists in job shop and production machine shop settings.

Key Features

• KC730 PVD-coated solid carbide grade with TiN finish for extended wear life
• 3.18 mm cutting width for consistent groove sizing
• Full radius geometry with 1.59 mm corner radius for smooth groove floor finish
• Left-hand insert orientation for dedicated left-hand toolholders
• Neutral rake angle supports stable cutting across C2, C3, and C4 material grades
• NR style, Top Notch series for positive indexing and secure clamping in compatible toolholders

Compatibility

Designed for use in Top Notch series toolholders that accept NR-style grooving inserts with the 3062 insert size designation. Compatible with left-hand Top Notch grooving and parting systems. Verify toolholder pocket style and hand orientation before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC turning technician with the machine in a locked-out, de-energized state per LOTO procedures. Seat the insert fully into the toolholder pocket and tighten the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert seat and clamp for chips or debris before indexing or replacing. Do not exceed the maximum depth of cut rating for the insert grade and workpiece material combination.