Sandvik Coromant 5757993 Threading Insert Solid Carbide

Product Description

The SANDVIK COROMANT 5757993 is a laydown threading insert designed for internal metric threading operations on CNC lathes and turning centers. Built from solid carbide with a dual-layer PVD coating of TiAlN and TiCrAlN, this insert delivers wear resistance and thermal stability in demanding threading applications. It carries a 60-degree included angle for standard metric thread profiles and a 2.50 mm pitch. With a right-hand cutting orientation and inscribed circle of 0.375 inches (9.53 mm), it fits standard CoroThread 266 series toolholders. Machinists and CNC operators working in production threading environments will find this insert suited to consistent, repeatable internal thread forming.

This insert is intended for internal right-hand metric threading in ferrous and non-ferrous materials across manufacturing and machining environments. It belongs to the CoroThread 266 series, which is designed for laydown-style insert seating in dedicated threading toolholders. The chipbreaker style is A, and the single-tooth-per-side geometry is optimized for precise thread profile engagement. Typical applications include threading bores in component parts for industrial, automotive, and general mechanical assembly where metric 60-degree threads are required.

Key Features

• Solid carbide substrate for rigidity and long cutting life
• PVD-applied TiAlN and TiCrAlN dual-layer coating for thermal and wear resistance
• Right-hand internal cutting orientation with 60-degree metric thread profile
• 2.50 mm pitch for standard metric threading
• CoroThread 266 series laydown-style seating geometry
• Chipbreaker style A for controlled chip formation in internal threading

Compatibility

Designed for use in CoroThread 266 series threading toolholders that accept size 16 laydown inserts with a 4.40 mm mounting hole diameter.

Installation Notes

Installation and indexing should be performed by a qualified CNC machinist or toolroom technician with the spindle fully stopped and the machine in a locked-out state. Use the correct torque wrench and insert clamp screw specified for the CoroThread 266 toolholder to ensure proper seating. Inspect the insert pocket for chips or debris before seating the insert, as contamination can affect thread profile accuracy. Follow the toolholder manufacturer's setup documentation for correct insert orientation and clamping procedure.