Kennametal 1690878 Threading Insert Iso KC5025 Tialn

Product Description

The KENNAMETAL 1690878 is a solid carbide laydown threading insert designed for external ISO threading operations on CNC lathes and turning centers. Carrying the KC5025 grade with a PVD-applied TiAlN coating, this insert delivers wear resistance and heat tolerance during high-speed threading cuts. It is a right-hand insert with a 1.25 mm pitch, a 3/8 inch (9.53 mm) inscribed circle, and a thickness of 0.1430 inches (3.44 mm). The CB chipbreaker geometry promotes reliable chip control during thread forming. Machinists and toolroom technicians working in precision machining, job shops, and production turning environments rely on this insert type for consistent thread profile accuracy.

This insert is suited for external ISO metric threading applications on steel, stainless steel, and similar materials where a PVD TiAlN coating provides the necessary surface protection. The 1.25 mm pitch makes it appropriate for standard M-series metric thread profiles commonly encountered in general manufacturing and component threading. It fits 16ER-style toolholders with a 3.94 mm hole diameter and is installed as a single insert per package, with a minimum order quantity of 10 pieces.

Key Features

• Solid carbide substrate with PVD TiAlN coating for wear and heat resistance
• KC5025 grade engineered for threading in steel and stainless steel applications
• Right-hand external ISO thread geometry with 1.25 mm pitch
• CB chipbreaker promotes controlled chip evacuation during threading passes
• 3/8 inch (9.53 mm) inscribed circle fits standard 16ER-style toolholders
• Laydown insert style for secure, repeatable seating in the pocket

Compatibility

Designed as an OEM-style replacement or direct-use threading insert for 16ER-style toolholders configured for external ISO threading applications.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully into the toolholder pocket and torque the clamping screw per the toolholder manufacturer specification. Inspect the insert seat and clamping components for wear or debris before installation to ensure proper contact and thread profile accuracy.