Sandvik Coromant 5757955 Threading Insert 5 Tpi 1/2 in Ic

Product Description

The SANDVIK COROMANT 5757955 is a laydown threading insert from the CoroThread 266 series, designed for cutting internal API Buttress threads on a lathe or turning center. Built from solid carbide with a PVD-applied TiAlN and TiCrAlN dual coating, this insert delivers wear resistance and thermal stability in demanding threading operations. It is sized at a 1/2 inch (12.70 mm) inscribed circle and cuts at 5 threads per inch with a 60-degree included angle. A single-tooth profile and right-hand cutting orientation make it suited for precision internal thread forming where surface finish and thread geometry are critical. Licensed machinists and CNC turning specialists are the primary installers of this tooling.

This insert is intended for internal API Buttress threading applications commonly found in oil and gas equipment manufacturing, pipe coupling production, and heavy industrial machining. The API Buttress thread form is a standardized profile used in casing and tubing connections in the petroleum industry. The 266RL-22BU01A050E 1125 catalog designation identifies the insert style, size, and grade, and it is used in compatible CoroThread 266 toolholders designed for that insert family. It is a per-unit item sold in packages of one, with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate with PVD TiAlN and TiCrAlN coating for extended wear life
• Cuts internal API Buttress threads at 5 TPI with a 60-degree included angle
• Right-hand cutting orientation for standard internal thread direction
• 1/2 inch (12.70 mm) inscribed circle with 0.2190 inch thickness and 5.56 mm measured thickness
• Single-tooth profile (chipbreaker style A) for controlled chip formation
• Manufacturer grade 1125 optimized for threading with PVD coating process

Compatibility

Designed for use in CoroThread 266 series toolholders compatible with the 266RL-22BU01A050E insert designation. Verify toolholder seat geometry and insert size code 22 compatibility before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC turning technician. Ensure the machine spindle is fully stopped and the turret is indexed to a safe position before seating or removing inserts. Use the manufacturer-specified torque wrench and clamping hardware to secure the insert — do not use makeshift tools that could damage the seating surface or insert geometry. Inspect the toolholder pocket for chips, wear, or damage before each insert change.