Kennametal 1764148 Grooving Insert NG4250K KC5025 Left Hand

Product Description

The KENNAMETAL 1764148 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and parting operations on CNC lathes and turning centers. It carries the KC5025 grade with a PVD-applied TiAlN coating, delivering wear resistance suited for interrupted cuts and general-purpose turning in steel and cast iron. The insert has a left-hand orientation, a 0.25 inch (6.35 mm) cutting width, and a maximum depth of cut of 0.25 inch (6.35 mm). A positive rake angle of 10 degrees and a K-style chip breaker work together to control chip flow and reduce cutting forces. This insert is handled and installed by machinists and CNC tooling technicians.

This insert is suited for grooving applications where consistent chip evacuation and tool life are priorities. The Top Notch series is a common platform in production turning environments, used across both job shops and high-volume manufacturing cells. The NG insert style and size 4250 seat size make it compatible with Top Notch-style toolholders configured for left-hand grooving. Applicable materials include steel, cast iron, and similar workpiece materials within the C2 and C6 material grade range. The 55-degree included angle and 3-degree lead angle support controlled entry into the workpiece.

Key Features

• KC5025 carbide grade with PVD TiAlN coating for extended wear resistance in steel and cast iron
• Left-hand orientation for right-to-left grooving operations
• 0.25 inch (6.35 mm) cutting width with a maximum depth of cut of 0.25 inch (6.35 mm)
• Positive rake angle (10 degrees) reduces cutting forces and heat generation
• K-style chip breaker promotes chip control during grooving and parting
• Corner radius of 0.0225 inch (0.57 mm) for controlled groove geometry

Compatibility

Designed as an OEM-style replacement insert for Top Notch series toolholders configured for the NG insert style with an insert seat size of 4 and left-hand orientation.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and de-energize the machine before changing inserts. Seat the insert fully in the toolholder pocket and torque the clamping screw to the toolholder manufacturer's specification using the appropriate Torx or hex key. Verify insert orientation and overhang before resuming cutting operations.