Sandvik Coromant 5757922 Threading Insert 18 Tpi Nptf

Product Description

The SANDVIK COROMANT 5757922 is a solid carbide laydown threading insert designed for cutting right-hand external NPTF threads at 18 threads per inch (TPI). Part of the CoroThread 266 series, it carries a dual PVD coating of TiCrAlN and TiAlN for improved wear resistance and tool life in demanding threading applications. The insert features a 60-degree included angle, a 3/8-inch inscribed circle, and a thickness of 5/32 inch (0.1563 inches). It is installed by machinists and tooling technicians on CNC lathes and turning centers where precision pipe thread profiles are required.

This insert is suited for external NPTF tapered pipe thread production on ferrous and non-ferrous workpieces in industrial machining environments. The CoroThread 266 platform is commonly used in production shops, oilfield component manufacturing, and fluid system component fabrication where leak-free pipe connections demand precise thread form geometry. The A-style chipbreaker supports controlled chip evacuation during single-point threading passes.

Key Features

• Solid carbide substrate with PVD-applied TiCrAlN and TiAlN dual coating for extended wear resistance
• Right-hand external NPTF thread profile at 18 TPI with a 60-degree included angle
• 3/8-inch inscribed circle and 0.1563-inch thickness for consistent seating in CoroThread 266 toolholders
• A-style chipbreaker for reliable chip control during threading passes
• Single tooth per side geometry for precise thread form accuracy
• Manufacturer grade 1125 optimized for the CoroThread 266 series insert style 266

Compatibility

Designed for use with CoroThread 266 series toolholders that accept a 16-size laydown threading insert with a 0.1732-inch hole diameter. Specific toolholder compatibility should be confirmed against the SANDVIK COROMANT CoroThread 266 toolholder selection for insert size code 16.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before indexing or replacing the insert. Use the correct torx or clamping screw specified for the CoroThread 266 toolholder to avoid improper seating. Do not exceed the clamping torque range listed in the toolholder documentation, and inspect the insert pocket for debris or damage before seating the new insert.