Kennametal 1796583 Threading Insert 16 Tpi KC5025 Carbide

Product Description

The KENNAMETAL 1796583 is a carbide threading insert designed for external thread cutting operations. It carries the NJ3010L16 style designation, is manufactured to the KC5025 grade, and features a TiAlN finish applied via PVD coating. The insert produces UNJ-standard external threads at 16 TPI with a 60-degree included angle. Built to Top Notch series geometry, it is a left-hand insert suited for CNC lathes and turning centers where precise thread form and tool life under interrupted or continuous cuts are required. Machinists and tool-and-die technicians working in aerospace, defense, and precision machining environments are the primary users of this insert.

This insert is intended for external threading applications on materials falling within the C2 and C6 material grade classifications, which correspond broadly to non-ferrous metals and general-purpose steels. The NJ insert style is specific to UNJ thread forms, which feature a controlled root radius for improved fatigue resistance in high-stress fastener applications. It is a standard replacement insert for Top Notch-compatible toolholders and is sold individually within a minimum order quantity of 5 units.

Key Features

• KC5025 carbide grade with PVD-applied TiAlN coating for wear and heat resistance
• NJ insert style for UNJ external thread form with 60-degree included angle
• Left-hand cutting configuration for appropriate spindle and holder orientation
• 16 TPI external pitch for common UNJ thread series work
• Corner radius of 0.0098 inches (0.25 mm) for consistent thread root geometry
• Top Notch series compatibility for secure insert seating and repeatable positioning

Compatibility

Designed as an OEM-style replacement insert for Top Notch series threading toolholders accepting NJ-style inserts in insert size 3010. Confirm toolholder hand orientation matches the left-hand designation before installation.

Installation Notes

Threading inserts of this type are installed and replaced by machinists or toolroom technicians on CNC or manual turning equipment. Power down the spindle and engage the machine lockout before changing inserts. Use the correct Torx or insert-key wrench to seat the insert fully against the pocket locating surfaces without overtightening. Inspect the toolholder pocket for wear or debris before seating a new insert, as a damaged pocket compromises thread form accuracy.