Kennametal 1114385 NRD4125 KC730 Carbide Grooving Insert

Product Description

The KENNAMETAL 1114385 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and parting operations on CNC lathes and turning centers. It carries a KC730 grade designation with a PVD-applied TiN coating, delivering wear resistance suited for C2, C3, and C4 material grades. The insert features a right-hand orientation, a 0.25-inch (6.35 mm) cutting width, and a full corner radius of 0.1252 inches (3.18 mm). Maximum depth of cut reaches 0.50 inches (12.70 mm). Neutral rake geometry supports consistent chip control during interrupted and continuous grooving passes.

This insert is applied in production turning environments where accurate groove width and depth repeatability are required. Typical applications include external grooving, profile turning, and parting on ferrous and non-ferrous workpieces falling within C2, C3, and C4 material classifications. The Top Notch series tooling system is a common platform in job shop and production machining cells requiring quick insert changeover. The NRD4125 insert size seats in a size-4 insert seat holder within that system.

Key Features

• Solid carbide substrate with PVD TiN coating for extended tool life on C2, C3, and C4 materials
• 0.25-inch (6.35 mm) cutting width for precise groove sizing
• Full corner radius of 0.1252 inches (3.18 mm) reduces stress concentration at groove base
• Maximum depth of cut of 0.50 inches (12.70 mm); compatible with depth-of-cut range of 0.30 to 1.00 inches
• Neutral rake geometry for balanced cutting forces
• Right-hand insert orientation; insert size 4125 for size-4 Top Notch seat holders

Compatibility

Designed for use with Top Notch series size-4 insert seat holders. Insert style NRD4125R/L is the referenced manufacturer seat designation. Compatible with workpiece materials graded C2, C3, and C4.

Installation Notes

Installation of grooving inserts should be performed by a qualified machinist or tooling technician with machine power fully locked out before any insert seating or removal. Seat the insert fully into the Top Notch holder pocket and confirm the locking mechanism is fully engaged before initiating any cut. Inspect the insert seat for chips or debris that could affect seating and runout. Follow the toolholder manufacturer torque guidance for the clamping screw rather than estimating by feel.