Sandvik Coromant 5757907 Threading Insert Metric 60

Product Description

The SANDVIK COROMANT 5757907 is a solid carbide laydown threading insert from the CoroThread 266 series, designed for external metric threading applications. It carries a dual PVD coating of TiCrAlN and TiAlN for extended cutting tool life at elevated temperatures. The insert features a right-hand cutting orientation, a 60-degree included angle, and a 1.50 mm pitch, making it suited for standard metric external thread profiles. Licensed HVAC, plumbing, and piping fabrication machinists as well as precision metalworking shops rely on this type of insert when threading stainless, alloy steels, and similar materials on CNC lathes and turning centers.

This insert is intended for use in external metric threading operations on turning machines. Its 266 insert style and 16 size code are compatible with CoroThread 266 toolholders configured for laydown-style inserts. The chipbreaker designation A and a 3/8-inch (9.53 mm) inscribed circle make it appropriate for medium-range workpiece diameters in both production and job-shop environments. Two teeth per side allow efficient threading passes.

Key Features

• Solid carbide substrate with PVD-applied TiCrAlN and TiAlN dual coating for wear resistance
• Right-hand, external metric 60-degree thread form at 1.50 mm pitch
• 3/8-inch (9.53 mm) inscribed circle with 5/32-inch (3.97 mm) thickness
• Chipbreaker style A for controlled chip evacuation during threading passes
• Two teeth per side for efficient multi-tooth threading
• CoroThread 266 series insert style 266, size code 16, manufacturer grade 1125

Compatibility

Designed for use in CoroThread 266 series toolholders that accept laydown-style threading inserts with insert style 266 and size code 16. Confirm toolholder seat geometry and insert hand before installation.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Ensure the CNC lathe or turning center is fully stopped and the spindle is locked before changing inserts. Use the correct torx or hex key torque driver specified by the toolholder manufacturer to seat the insert clamp screw. Inspect the toolholder pocket for chips or debris before seating the insert to avoid micro-fractures in the carbide substrate.