Kennametal 1818357 Grooving Insert KC5025 Tialn Top Notch

Product Description

The KENNAMETAL 1818357 is a solid carbide grooving insert designed for external grooving and profiling operations on CNC lathes and turning centers. Cataloged in the Top Notch series, this insert carries a TiAlN coating applied via PVD process, delivering thermal resistance and wear protection suited for interrupted cuts and dry or semi-dry machining environments. The insert features a 0.125 inch (3.18 mm) cutting width, a maximum depth of cut of 0.250 inch (6.35 mm), and a positive rake angle of 10 degrees. Grade KC5025 targets steel, stainless, and difficult-to-machine alloys at moderate to high cutting speeds.

This insert is configured for right-hand tooling and seats in Top Notch compatible insert holders using seat size 4. The K chip breaker geometry and positive rake promote controlled chip evacuation during grooving passes. It is a practical choice for production turning shops running high-volume grooving cycles where consistent tool life and predictable chip control are priorities. A corner radius of 0.0075 inch (0.19 mm) provides edge definition without excessive stress concentration at the groove base. The included angle of 55 degrees and lead angle of 3 degrees are consistent with standard Top Notch grooving profiles.

Key Features

• Solid carbide substrate with KC5025 grade — suited for steel and difficult-to-machine alloys
• TiAlN coating via PVD process for thermal resistance and extended tool life
• 0.125 inch (3.18 mm) cutting width with a maximum depth of cut of 0.250 inch (6.35 mm)
• Positive rake angle of 10 degrees with K chip breaker for controlled chip evacuation
• Corner radius of 0.0075 inch (0.19 mm) for precise groove geometry
• Right-hand configuration, Top Notch series, insert seat size 4

Compatibility

Designed for use with Top Notch series insert holders accepting seat size 4 and insert style NGD. The MSC and manufacturer cross-reference number is NGD4125R/LK. Verify holder compatibility against the Top Notch series tooling system before ordering.

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. Ensure the machine spindle is fully stopped and the turret is in a safe index position before seating or removing inserts. Use the appropriate torx or hex key specified for the Top Notch clamping system and confirm the insert is fully seated against the pocket walls before resuming operation. Do not exceed the maximum depth of cut rating for the insert and holder combination in use.