Kennametal 1743967 Threading Insert Npt 14 Tpi Carbide

Product Description

The KENNAMETAL 1743967 is a solid carbide laydown threading insert designed for cutting internal NPT threads on CNC lathes and threading toolholders. Running in the KC5025 grade with a PVD-applied TiAlN coating, this insert handles right-hand internal threading at 14 threads per inch. The 1/4-inch (6.35 mm) inscribed circle and 0.126-inch thickness match standard LT11NR toolholder pockets. KC5025 is engineered for toughness and wear resistance in interrupted and continuous threading cuts, making it a reliable choice for production threading environments where consistent thread form and tool life matter.

This insert is suited for threading steel, stainless steel, cast iron, superalloys, and titanium workpieces. It is primarily used in CNC turning centers and manual lathes equipped with LT11-style threading toolholders. Typical applications include pipe fitting production, manifold threading, and any operation requiring accurate NPT taper thread profiles in metalworking shops, oilfield component manufacturing, and industrial machining environments. The NPT thread standard makes this insert appropriate for producing pressure-tight tapered pipe thread connections common in fluid and gas systems.

Key Features

• Solid carbide substrate in KC5025 grade for toughness and extended wear resistance
• PVD TiAlN coating improves heat resistance and reduces crater wear during threading
• Right-hand cut, internal NPT thread form at 14 TPI for standard tapered pipe threads
• 1/4-inch inscribed circle with 0.126-inch thickness fits LT11NR toolholder pockets
• Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium
• ISO code LT11NR14NPT for precise toolholder and insert matching

Compatibility

Designed for use in LT11NR-style laydown threading toolholders accepting inserts with a 1/4-inch inscribed circle and 0.126-inch thickness. Verify toolholder pocket specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine powered off and in a locked-out state. Seat the insert fully in the toolholder pocket and torque the clamping screw according to the toolholder manufacturer's specifications. Inspect the insert pocket for chips or debris before seating to avoid insert rocking or premature breakage. Confirm thread pitch and hand orientation match the workpiece requirements before initiating a threading cycle.