Sandvik Coromant 5781864 Threading Insert Corothread 266

Product Description

The SANDVIK COROMANT 5781864 is a solid carbide external threading insert engineered for precision metric thread cutting on CNC lathes and turning centers. Part of the CoroThread 266 series, this insert carries the 1135 manufacturer grade and is produced with a PVD coating process for improved wear resistance and edge integrity. It cuts a standard 60-degree metric thread profile at a 1.00 mm external pitch, making it suited for tight-tolerance threading operations in production environments. Licensed machinists and CNC operators will find this insert provides consistent thread form on external diameters where dimensional accuracy is critical.

This insert is designed for external metric threading applications in right-hand cutting setups. The CoroThread 266 series is widely applied in general machining shops, aerospace component work, and precision part manufacturing where repeatable thread quality is required. At a 1.00 mm pitch and 60-degree included angle with an A chipbreaker geometry, it performs well in medium to fine threading passes on steel and similar workpiece materials. It is packaged and sold as a single insert.

Key Features

• Solid carbide substrate with PVD coating for extended tool life and edge stability
• 1.00 mm external pitch, 60-degree metric thread standard for precise thread form
• Right-hand cutting orientation with A-style chipbreaker geometry
• Insert size 16, fits CoroThread 266 series toolholders
• 1135 manufacturer grade suited for threading steel and comparable workpiece materials
• ISO code 266RG16MM01A100M1135 for cross-reference and tooling system ordering

Compatibility

Designed for use with CoroThread 266 series toolholding systems accepting size 16 external threading inserts. Refer to SANDVIK COROMANT CoroThread 266 toolholder selection guides to confirm seat and clamping compatibility before installation.

Installation Notes

Insert installation and replacement should be performed by a qualified CNC machinist or tooling technician with the machine in a full stop, spindle-off condition. Use the correct torx or clamping key specified by the toolholder manufacturer when seating the insert to avoid over-torque or seat damage. Inspect the toolholder pocket for debris or wear before seating a new insert. Follow the toolholder manufacturer recommendations for clamping torque and insert orientation before resuming cutting operations.