Kennametal 1114948 Threading Insert NJP3014R12 KC850 12 Tpi

Product Description

The KENNAMETAL 1114948 is a carbide threading insert designed for external thread cutting operations on CNC lathes and turning centers. Manufactured to the NJP insert style in the Top Notch series, this insert carries the KC850 grade — a CVD-coated carbide with a TiC/TiCN/TiN multilayer finish suited for steel and stainless threading applications in the C5 and C6 material grade range. It cuts right-hand external threads to the UNJ standard at 12 TPI with a 60-degree included angle. The corner radius measures 0.013 decimal inches and tip-to-top height is 0.098 decimal inches, making precise seating in a compatible Top Notch holder essential for on-spec thread form.

This insert is used in precision external threading of aerospace and industrial fastener profiles where the UNJ thread form — with its controlled root radius — is specified. Typical applications include turning of alloy steel and stainless components on CNC lathes in job shop, production, and aerospace manufacturing environments. The KC850 CVD coating provides wear resistance and edge stability during interrupted or continuous threading passes at moderate to high cutting speeds. Machinists and CNC programmers working to UNJ specifications will recognize the NJP3014R12 designation as the insert geometry and size code within the Top Notch platform.

Key Features

• KC850 carbide grade with CVD-applied TiC/TiCN/TiN multilayer coating for wear resistance in steel threading
• 12 TPI external thread pitch to UNJ thread standard with 60-degree included angle
• Right-hand cutting orientation for standard CNC lathe external threading passes
• NJP insert style in the Top Notch series — compatible with Top Notch toolholders
• Corner radius of 0.013 decimal inches (0.33 mm) for controlled UNJ root form
• C5 and C6 material grade classification, suitable for steel and stainless threading

Compatibility

Designed for use with KENNAMETAL Top Notch series external threading toolholders that accept the NJP3014R12 insert size and style. Verify holder compatibility against the Top Notch system specifications before ordering.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torque wrench and clamping screw specified for the Top Notch holder to ensure proper insert retention — do not overtighten by hand. Inspect the insert pocket and clamping surfaces for chips or debris before seating to prevent insert rocking and thread-form error.