Sandvik Coromant 5758051 Threading Insert 4-7 Tpi

Product Description

The SANDVIK COROMANT 5758051 is a solid carbide laydown threading insert designed for external thread cutting on CNC lathes and turning centers. Part of the CoroThread 266 series, it features a TiCrAlN/TiAlN PVD coating for extended tool life in a wide range of workpiece materials. This insert handles right-hand external 60-degree V threads across a pitch range of 4 to 7 TPI (3.50 to 6.00 mm pitch). The 1/2-inch (12.70 mm) inscribed circle and 5.56 mm thickness conform to the 266 insert standard. Installation is performed by qualified machinists and CNC tooling technicians during lathe tooling setup.

This insert is suited for single-point external threading operations in production and job-shop environments. It covers a broad pitch range, making it practical for threading operations on fastener profiles, hydraulic fittings, and general-purpose threaded components. The A chipbreaker geometry and single tooth per side design are optimized for controlled chip formation during threading passes. The manufacturer catalog number for this insert is 266RG-22VM01A001M 1125.

Key Features

• Solid carbide substrate with PVD-applied TiCrAlN/TiAlN dual-layer coating for wear and heat resistance
• Right-hand external 60-degree V thread form covering 4 to 7 TPI (3.50 to 6.00 mm pitch)
• 1/2-inch (12.70 mm) inscribed circle, 0.2190-inch (5.56 mm) thickness - CoroThread 266 form factor
• A chipbreaker geometry for controlled chip evacuation during threading passes
• 0.48 mm (0.0189-inch) corner radius for consistent thread root form
• Manufacturer grade 1125 - PVD-coated carbide grade suited for threading at moderate to high cutting speeds

Compatibility

Designed as an OEM-style replacement insert for CoroThread 266 series toolholders accepting 22-size laydown threading inserts with a 5.70 mm hole diameter and 1/2-inch inscribed circle.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine before seating or removing inserts. Ensure the insert pocket and clamping screw are free of chips and debris before installation to prevent insert rocking or premature failure. Follow the toolholder manufacturer torque specification for the clamping screw - do not over-tighten, as solid carbide inserts are brittle.