Kennametal 1113615 Grooving Insert NG4250 K68 Left Hand

Product Description

The KENNAMETAL 1113615 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and parting operations on CNC lathes and turning centers. This uncoated, left-hand insert features a K68 carbide grade with a neutral rake geometry and a 0.25 inch (6.35 mm) cutting width. The bright uncoated finish suits applications where coating is unnecessary or counterproductive, such as machining non-ferrous metals and cast iron. Licensed machinists and CNC operators install this insert into compatible Top Notch toolholders as part of routine tooling maintenance or job-specific setup.

This insert is suited for grooving and turning operations in production and job-shop environments. It performs in both light and moderate interrupted cuts on non-ferrous materials, cast iron, and similar workpiece materials consistent with a C3 material grade rating. The 55-degree included angle and 3-degree lead angle support controlled chip formation during grooving passes. The insert size designation 4250 and seat size 4 govern toolholder compatibility within the Top Notch system.

Key Features

• K68 solid carbide grade with bright uncoated finish for non-ferrous and cast iron applications
• Left-hand cutting orientation for dedicated left-hand Top Notch toolholders
• 0.25 inch (6.35 mm) cutting width with a maximum depth of cut of 0.25 inch (6.35 mm)
• Neutral rake geometry with a 0.0225 inch (0.57 mm) corner radius for controlled chip load
• 55-degree included angle and 3-degree lead angle for stable grooving entry
• Top Notch series insert seat size 4 for positive mechanical clamping

Compatibility

Designed for use in KENNAMETAL Top Notch series toolholders accepting insert seat size 4 and configured for left-hand cutting orientation. Verify toolholder seat size and hand designation before installation.

Installation Notes

This insert is installed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct Top Notch clamping screw and torque it with the manufacturer-specified wrench to achieve proper seating - do not overtighten by hand or with an unapproved tool. Inspect the insert seat for chips or debris before seating the new insert to prevent seating errors or premature edge failure.