Kennametal 1743902 Laydown Threading Insert 20 Tpi Un

Product Description

The KENNAMETAL 1743902 is a solid carbide laydown threading insert designed for cutting internal UN threads in a right-hand orientation. Carrying the ISO code LT11NR20UN and manufactured to the KC5025 grade, this insert features a TiAlN coating applied via PVD process, delivering enhanced wear resistance and thermal stability during threading operations. It runs at 20 threads per inch with a 1/4 inch (6.35 mm) inscribed circle and a thickness of 0.126 inches (3.04 mm). Licensed machinists and CNC operators install this insert into compatible toolholders for precision thread-form work on turned or bored features.

This insert is suited for threading operations on steel, stainless steel, cast iron, superalloys, and titanium workpieces. Its NR insert style and size code 11 geometry make it a common choice for internal threading on CNC lathes and turning centers in production and job-shop environments. The right-hand cutting configuration is standard for conventional internal thread applications where the spindle advances into the bore.

Key Features

• Solid carbide substrate with TiAlN PVD coating for heat and wear resistance
• 20 TPI cutting geometry for UN internal thread standard
• Right-hand cutting orientation for standard internal threading
• 1/4 inch inscribed circle with 0.128 inch hole diameter for positive toolholder seating
• Compatible with primary workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium
• KC5025 manufacturer grade optimized for demanding threading applications

Compatibility

Designed as an OEM-style replacement threading insert for NR-style size 11 internal threading toolholders accepting the LT11NR20UN insert geometry. Verify toolholder ISO seat designation before ordering.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Disengage machine power and confirm the spindle is fully stopped before changing inserts. Seat the insert firmly against all toolholder contact surfaces and torque the clamping screw to the toolholder manufacturer specification. Inspect the insert seating pocket for chips or debris before securing the clamp to ensure proper insert positioning and thread-form accuracy.