Sandvik Coromant 5857544 Threading Insert 10 Tpi Acme

Product Description

The SANDVIK COROMANT 5857544 is a solid carbide laydown threading insert designed for external Acme thread cutting at 10 threads per inch (TPI). Part of the CoroThread 266 series, this insert carries a PVD-applied TiCrAlN/TiN coating that provides heat resistance and extended edge life in demanding threading operations. The insert features a right-hand orientation, a 3/8 inch (9.53 mm) inscribed circle, and a thickness of 5/32 inch (3.97 mm). It is engineered for use in precision CNC turning applications where Acme thread profiles are required, and is handled by machinists and tooling specialists in production and job-shop environments.

This insert is suited for external Acme threading operations on CNC lathes and turning centers. The Acme thread standard is commonly used in power transmission applications such as lead screws, vises, and linear actuators. The CoroThread 266 platform is designed for reliable thread-form accuracy and consistent performance across production runs. The F chipbreaker geometry is specified on this insert. This insert is sold individually with a minimum order quantity of 10 units per order.

Key Features

• Solid carbide substrate with PVD TiCrAlN/TiN coating for wear resistance and thermal stability
• External right-hand Acme thread profile at 10 TPI with a 60-degree included angle
• 3/8 inch (9.53 mm) inscribed circle, 5/32 inch (3.97 mm) thick, 0.1732 inch hole diameter
• F chipbreaker geometry for controlled chip evacuation during threading passes
• Part of the CoroThread 266 series, insert style 266, size code 16
• Manufacturer catalog number 266RG-16AC01F100E 1135, grade 1135

Compatibility

Designed for use in CoroThread 266 series toolholders that accept size-16 laydown threading inserts with a 0.1732 inch hole diameter. Verify toolholder seat geometry and insert pocket dimensions before installation.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and all power is locked out before seating or removing inserts. Use the appropriate torx or insert-clamping key specified for the CoroThread 266 toolholder to avoid seat damage or insert cracking. Inspect the insert pocket and clamping screw for wear or debris before each insert change.