Kennametal 4175944 Threading Insert 12 Tpi Unj

Product Description

The KENNAMETAL 4175944 is a carbide threading insert designed for external thread-cutting operations on CNC lathes and turning centers. It carries the NJP3014R12 insert designation within the Top Notch series and is manufactured to a KCU10 grade with an AlTiN finish applied by a PVD coating process. The insert cuts right-hand external threads at 12 TPI to the UNJ thread standard, which requires the controlled root radius profile critical in aerospace and high-stress fastener applications. Thickness is 0.195 inches (4.95 mm) with a corner radius of 0.013 inches (0.33 mm). Machinists and tooling technicians working in aerospace, defense, and precision machining environments are the primary users of this insert.

This insert is suited for external UNJ threading on materials typically encountered in aerospace and structural applications. The Top Notch series uses a top-clamping toolholder system that provides rigid, repeatable insert indexing. The KCU10 carbide grade combined with the AlTiN PVD finish delivers wear resistance and thermal protection during continuous or interrupted threading passes. This insert is sold individually but requires a minimum order quantity of 5 units.

Key Features

• Carbide substrate with AlTiN finish applied by PVD coating process for wear and heat resistance
• Cuts external right-hand threads to UNJ standard at 12 TPI
• 60-degree included angle for standard unified thread form profile
• Corner radius of 0.013 inches (0.33 mm) meets UNJ controlled root radius requirements
• NJP insert style engineered for the Top Notch top-clamping toolholder system
• Insert size 3014 with thickness of 0.195 inches for rigid seating in compatible holders

Compatibility

Designed for use with Top Notch series toolholders that accept the NJP insert style in size 3014. Consult KENNAMETAL toolholder documentation to confirm holder compatibility before ordering.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or tooling technicians following the toolholder manufacturer's clamping torque and seating procedures. Power down and lock out the machine spindle before changing or indexing any insert. Inspect the insert pocket and clamping screw for wear or debris prior to seating the new insert. Handle carbide inserts carefully to avoid chipping the cutting edge.