Sandvik Coromant 5757885 Laydown Threading Insert 5 Tpi

Product Description

The SANDVIK COROMANT 5757885 is a solid carbide laydown threading insert designed for external API Buttress thread turning operations. Part of the CoroThread 266 series, it features a TiAlN and TiCrAlN PVD coating applied via physical vapor deposition for wear resistance and thermal stability at the cutting edge. The insert is right-hand oriented with a 5 TPI thread pitch, a 1/2 inch (12.70 mm) inscribed circle, and a 60-degree included angle. It is sized for demanding single-point threading on pipe and coupling stock where API Buttress thread form conformance is required. Licensed machinists and CNC lathe operators in the oilfield, pipe fabrication, and industrial manufacturing sectors are the primary users of this insert.

This insert is applied in external threading of API Buttress-standard pipe connections, commonly encountered in oil country tubular goods (OCTG) production and heavy-duty pipe fabrication. The CoroThread 266 platform is built for close-tolerance thread forming where consistent thread profile and surface finish are critical across production runs. The single-tooth-per-side geometry and A chipbreaker designation suit controlled-chip threading passes on lathes and CNC turning centers equipped with appropriate 266-series toolholders.

Key Features

• Solid carbide substrate with TiAlN and TiCrAlN PVD dual coating for extended tool life
• Right-hand external API Buttress thread form at 5 TPI
• 1/2 inch inscribed circle with 5.56 mm (0.2190 inch) insert thickness
• 60-degree included angle with A chipbreaker for controlled chip evacuation
• CoroThread 266 series platform insert style for use with compatible 266-series holders
• Hole diameter of 5.70 mm (0.2244 inch) for secure screw-on mounting

Compatibility

Designed for use with SANDVIK COROMANT CoroThread 266 series toolholders accepting insert style 266 with a 16 size code. Catalog reference number for this insert is 266RG-22BU01A050E 1125.

Installation Notes

Installation is performed by a qualified machinist or CNC lathe operator. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the insert pocket and seating surfaces are clean and free of chips before torquing the clamping screw to the toolholder manufacturer's specified value. Follow applicable shop safety standards and toolholder manufacturer guidelines for insert indexing and replacement intervals.