Kennametal 1743735 Laydown Threading Insert KC5025 28 Tpi

Product Description

The KENNAMETAL 1743735 is a laydown-style carbide threading insert in the LT16ER28UNJ geometry, designed for external right-hand thread turning at 28 threads per inch to the UNJ standard. Manufactured from carbide in grade KC5025 with a TiAlN coating applied via PVD, the insert is engineered for consistent thread form accuracy and extended tool life across interrupted and continuous cuts. The cutting edge to theoretical edge length and the face-of-insert to tip centerline each measure 0.027 inches. It is installed in compatible laydown-style external threading toolholders and is used by machinists and CNC lathe operators in production and job-shop environments.

This insert is suited for external threading operations on steel, stainless steel, cast iron, superalloys, and titanium workpieces. The KC5025 grade with TiAlN PVD coating is particularly well-matched to the elevated cutting temperatures and work-hardening tendencies of stainless steel and superalloys. Typical applications include aerospace fastener threads, hydraulic fitting threads, and precision shaft threading where UNJ thread form is specified for fatigue resistance.

Key Features

• UNJ thread form at 28 TPI for fatigue-resistant external threading
• KC5025 carbide grade with TiAlN PVD coating for heat and wear resistance
• Right-hand external cutting geometry (ER designation)
• Insert size code 16 laydown-style for use in standard LT-style holders
• Compatible with steel, stainless steel, cast iron, superalloys, and titanium workpieces
• Cutting edge to theoretical edge length of 0.027 inches for precise thread form geometry

Compatibility

Designed as an OEM-style replacement laydown threading insert for use in LT16-size external threading toolholders accepting ER-style inserts. Verify holder seat geometry and insert size code before installation.

Installation Notes

Threading inserts of this type are installed and serviced by qualified machinists or CNC lathe operators. Power down and lock out the machine spindle before seating or indexing the insert. Use the appropriate torx or hex key per the toolholder manufacturer specification to secure the insert clamp. Inspect the insert pocket and clamp for wear or debris before seating a new insert to ensure correct seating and thread form accuracy.