Kennametal 1743966 Threading Insert 18 Tpi Npt KC5025

Product Description

The KENNAMETAL 1743966 is a solid carbide laydown threading insert designed for internal NPT thread cutting operations. Running under ISO code LT11NR18NPT and manufacturer grade KC5025, this insert features a TiAlN coating applied via PVD process, which improves wear resistance and thermal stability during threading. It cuts at 18 threads per inch (TPI) with a right-hand orientation, making it suitable for producing standard NPT taper pipe threads in a lathe or CNC turning center. The inscribed circle measures 0.25 inches, and the insert thickness is 0.126 inches (3.04 mm). Licensed machinists and CNC operators working in production or job-shop environments install this insert on compatible toolholders.

This insert is used for internal threading on a range of workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium. The KC5025 grade with TiAlN PVD coating is well suited for these demanding materials where edge integrity and coating adhesion are critical. Typical applications include threading pipe fittings, hydraulic components, and fluid-system housings that require NPT taper thread forms. It fits NR-style insert seats in size 11 toolholders designed for laydown threading geometry.

Key Features

• Solid carbide construction with TiAlN PVD coating for extended tool life on ferrous and exotic alloy workpieces
• 18 TPI internal NPT thread form for standard taper pipe thread production
• Right-hand cutting orientation, NR insert style, size 11 seat
• Inscribed circle of 0.25 inches with hole diameter of 0.128 inches for secure clamping
• Cutting edge to theoretical edge length of 0.031 inches; face of insert to tip centerline of 0.039 inches
• Compatible with steel, stainless steel, cast iron, superalloys, and titanium workpieces

Compatibility

Designed for use in NR-style, size 11 laydown threading toolholders. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium. Verify toolholder seat geometry and clamping configuration before use.

Installation Notes

This insert is installed and changed by machinists or CNC lathe operators. Power down and lock out the machine spindle before seating or removing the insert. Use the correct torx or hex key to the toolholder manufacturer's specified clamping procedure — do not overtighten or impact-drive the clamping screw. Confirm insert orientation and thread hand match the programmed tool path before resuming cutting.