Kennametal 1113527 NR4125 K68 Carbide Grooving Insert

Product Description

The KENNAMETAL 1113527 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and turning operations on CNC lathes and turning centers. Built from uncoated K68 carbide grade (material grade C3), this right-hand insert delivers consistent performance in non-ferrous and cast iron applications where a bright, uncoated surface is preferred. The insert features a 0.25 inch (6.35 mm) cutting width, a maximum depth of cut of 0.25 inch (6.35 mm), and a full-radius corner profile with a 0.125 inch (3.18 mm) corner radius. Neutral rake geometry supports stable chip formation across a range of workpiece materials.

This insert is suited for precision grooving, parting, and profile turning in both production and job-shop environments. The NR4125 insert style fits standard Top Notch toolholders with an insert seat size of 4. It is appropriate for use on CNC turning centers handling non-ferrous metals, aluminum alloys, and cast iron where an uncoated carbide grade is specified. The 55-degree included angle and neutral rake make it a practical choice for controlled-depth grooving where dimensional accuracy is critical.

Key Features

• Solid carbide K68 grade (C3 material grade) - uncoated, bright finish for non-ferrous and cast iron cutting
• 0.25 inch (6.35 mm) cutting width with full-radius corner profile
• Maximum depth of cut: 0.25 inch (6.35 mm); effective range 0.20 to 0.30 inch (5.00 to 10.00 mm)
• Corner radius: 0.125 inch (3.18 mm); neutral rake geometry
• Right-hand orientation; insert style NR, insert size 4125, seat size 4
• Top Notch series - indexes into compatible Top Notch grooving toolholders

Compatibility

Designed for use with Top Notch series grooving toolholders accepting insert seat size 4 and NR-style inserts. MSC and manufacturer cross-reference number NR4125R/L.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torque wrench and clamping hardware specified for the Top Notch toolholder to secure the insert - do not overtighten by hand. Inspect the insert seat and clamping components for wear or debris before indexing to a new cutting edge.