Seco 00064426 Threading Insert 14 Tpi Un Internal Carbide

Product Description

The SECO 00064426 is a laydown threading insert designed for internal UN thread cutting at 14 threads per inch. It is manufactured from solid carbide in the CP500 grade and carries a TiAlN/TiN finish applied via PVD coating. The insert follows the 16NR style with an A1 chipbreaker geometry, a 60-degree included angle, and right-hand cutting orientation. With an inscribed circle of 0.375 inches and a thickness of 0.1366 inches, this insert seats in standard 16NR-style toolholders used for internal threading operations on CNC lathes and turning centers. Installation and operation are handled by machining professionals in production and job-shop environments.

This insert is suited for internal threading applications on cast iron, stainless steel, and carbon or alloy steel workpieces. It belongs to the Snap-Tap series and conforms to ISO standards, making it a fit for shops running metric or inch-standard tooling systems. The A1 chipbreaker promotes chip control during threading passes on tough and abrasive materials. It is used in single-point threading cycles where consistent thread form and tool life are priorities across medium to high production runs.

Key Features

• 16NR insert style with A1 chipbreaker for controlled chip evacuation during internal threading
• CP500 solid carbide grade with TiAlN/TiN PVD coating for wear resistance on ferrous materials
• 14 TPI UN thread standard, right-hand internal cutting orientation
• 60-degree included angle conforms to UN thread form geometry
• 0.375 inch inscribed circle and 0.1366 inch thickness for compatibility with standard 16NR toolholders
• Rated for cast iron, stainless steel, and steel workpiece materials

Compatibility

Designed for use in 16NR-style internal threading toolholders. Compatible with cast iron (ISO material code K), stainless steel (M), and steel (P) workpieces. Conforms to ISO standards for laydown threading insert geometry.

Installation Notes

This insert is installed and replaced by machinists or tooling technicians on CNC or manual turning equipment. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before seating or removing the insert. Use the appropriate torque wrench and insert screw specified by the toolholder manufacturer — do not overtighten or substitute hardware. Verify insert orientation and thread hand before initiating the threading cycle.