Kennametal 1114376 Threading Insert KC730 20 Tpi Unj

Product Description

The KENNAMETAL 1114376 is a carbide threading insert designed for external thread cutting on CNC lathes and turning centers. Carrying the NJK3008R20 designation within the Top Notch series, this right-hand insert is coated with Titanium Nitride (TiN) via a PVD process, delivering improved surface hardness and wear resistance for consistent thread form over extended run times. It cuts at 20 threads per inch (TPI) with a 60-degree included angle and a corner radius of 0.0078 inches, producing UNJ external threads with the controlled root radius geometry aerospace and high-precision applications demand. Licensed machinists and CNC turning specialists are the primary installers.

This insert is built for external UNJ thread applications where root radius control is critical, such as aerospace fastener and structural component machining. The KC730 grade, rated for material grades C2, C3, and C4, is suited for threading steel, stainless, and other ferrous alloys at moderate to high cutting speeds. The Top Notch quick-change insert system allows fast indexing with repeatable positioning, reducing setup time on production runs.

Key Features

• 20 TPI external UNJ thread form with 60-degree included angle
• KC730 carbide grade rated for C2, C3, and C4 material classifications
• PVD-applied Titanium Nitride (TiN) finish for enhanced wear resistance
• Right-hand cutting orientation for standard external thread turning
• Corner radius of 0.0078 inches provides UNJ-compliant controlled root radius
• Top Notch series insert system for repeatable quick-change indexing

Compatibility

Designed for use in KENNAMETAL Top Notch series toolholders accepting NJK-style inserts. Insert size designation is 3008. Confirm toolholder compatibility with the NJK insert style before ordering.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the turret is in a safe index position before changing inserts. Seat the insert firmly in the Top Notch pocket and verify clamping before resuming cuts. Do not exceed the toolholder manufacturer's recommended depth of cut or feed rate for threading operations.