Kennametal 1690874 Threading Insert Iso 0.75mm Carbide

Product Description

The KENNAMETAL 1690874 is a solid carbide laydown threading insert designed for external ISO thread cutting on CNC lathes and turning centers. Carrying the KC5025 manufacturer grade with a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability in demanding threading operations. It cuts right-hand external ISO threads at a pitch of 0.75mm and seats in standard LT16ER toolholders. The 3/8-inch (9.53mm) inscribed circle and 3.44mm thickness (0.1430 inches) conform to common indexable insert geometry standards, making it a straightforward drop-in for compatible tooling systems. Machinists and CNC operators in production and job-shop environments use this insert for threading ferrous and non-ferrous workpieces where close pitch tolerances are required.

This insert is suited for external threading operations on lathes, turning centers, and multi-axis machining centers running ISO-standard thread forms at 0.75mm pitch. Typical applications include threading precision shafts, fittings, and fastener features in steel, stainless, and cast materials. The CB chipbreaker geometry helps manage chip flow in continuous threading passes. This is a professional-grade cutting tool intended for use by machinists, tooling specialists, and CNC programmers in industrial manufacturing environments.

Key Features

• Solid carbide substrate with KC5025 grade for high wear resistance in threading operations
• PVD TiAlN coating provides thermal and oxidation resistance during high-speed cuts
• Right-hand external ISO thread form at 0.75mm pitch
• CB chipbreaker geometry for controlled chip evacuation in threading passes
• 3/8-inch (9.53mm) inscribed circle fits standard LT16ER-style toolholders
• Thickness of 3.44mm (0.1430 inches) conforms to laydown insert seating standards

Compatibility

Designed for use in LT16ER-style laydown threading toolholders that accept ISO external threading inserts with a 3/8-inch inscribed circle. Verify toolholder designation and insert pocket geometry before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque driver for the insert clamping screw to ensure proper seating - refer to the toolholder manufacturer's specification for clamping torque. Inspect the insert pocket and clamping components for wear or debris before seating the new insert.