Sandvik Coromant 5757794 Threading Insert Carbide 60 Degree

Product Description

The SANDVIK COROMANT 5757794 is a solid carbide threading insert designed for internal thread cutting on CNC lathes and turning centers. Part of the CoroThread 266 series, it features a left-hand cutting orientation and a partial profile 60-degree thread form, making it suited for cutting internal threads across a range of metric pitch sizes from 1.00 to 2.00 mm. The insert carries manufacturer grade 1125 with a PVD coating for wear resistance and edge integrity. A chipbreaker style A geometry supports controlled chip evacuation during threading passes. Installed by CNC machinists and toolroom technicians in production and job-shop environments.

This insert is applied in internal threading operations on lathes and mill-turn machines where a left-hand, 60-degree partial profile is required. The CoroThread 266 system is a common choice in precision machining of hydraulic components, fittings, and threaded bores requiring consistent thread form across medium to high volume runs. The 1125 grade with PVD coating is suited for threading steel, stainless steel, and similar materials at controlled cutting parameters. Iso code 266LL16VM01A001M1125 identifies the insert geometry and grade for replacement ordering.

Key Features

• Solid carbide substrate with PVD coating for extended tool life in threading applications
• Left-hand cutting orientation for internal thread geometry
• Partial profile 60-degree included angle covers metric pitches from 1.00 to 2.00 mm
• Chipbreaker style A for consistent chip control during internal threading passes
• Insert size 16 with 3.97 mm thickness for use in CoroThread 266 toolholders
• Corner radius of 0.06 mm (0.0024 inches) for precise thread root form

Compatibility

Designed for use with SANDVIK COROMANT CoroThread 266 series toolholders that accept size 16 threading inserts with left-hand internal configuration. Iso code 266LL16VM01A001M1125 should be used to confirm holder and insert compatibility before installation.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully into the pocket and torque the clamping screw to the toolholder manufacturer specification listed in the CoroThread 266 system documentation. Inspect the insert seat and clamping components for wear or debris before seating a new insert to ensure proper contact and tool life.