Kennametal 1743736 Laydown Threading Insert 24 Tpi Unj

Product Description

The KENNAMETAL 1743736 is a solid carbide laydown threading insert designed for external UNJ thread-form cutting on CNC lathes and turning centers. Carrying the ISO code LT16ER24UNJ, it runs at 24 threads per inch with a right-hand cutting orientation. The insert is manufactured from carbide and coated with TiAlN via a PVD process, which delivers elevated heat resistance and extended edge life when threading challenging materials. At 0.143 inches thick with a 3/8-inch inscribed circle, it seats securely in compatible ER-style laydown toolholders. This insert is selected and installed by CNC machinists and tool-room technicians in production and job-shop environments.

This insert is suited for threading steel, stainless steel, cast iron, superalloys, and titanium workpieces. The UNJ thread standard specifies a controlled root radius on external threads, making this insert the correct choice for aerospace and high-fatigue applications where UNJ geometry is called out on the print. It is a single insert per package unit with a minimum order quantity of 10 pieces, consistent with production-floor tooling procurement.

Key Features

• TiAlN PVD coating for high heat resistance and extended tool life in ferrous and exotic alloys
• 24 TPI UNJ external thread form with right-hand cutting direction
• Solid carbide substrate in KC5025 manufacturer grade for toughness and wear resistance
• 3/8-inch inscribed circle in ER insert style for stable seating in laydown toolholders
• 0.143-inch insert thickness with 0.1551-inch hole diameter for positive clamping
• Compatible with primary workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium

Compatibility

Designed for use in ER-style laydown threading toolholders accepting a size 16 insert with a 3/8-inch inscribed circle. Intended for external UNJ thread-form operations on CNC turning equipment. Verify toolholder pocket geometry and insert size code 16 compatibility before installation.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and clamping screw specified by the toolholder manufacturer to secure the insert without cracking the carbide substrate. Confirm thread-form geometry and TPI against the part print before initiating a threading cycle.