Sandvik Coromant 5781942 Threading Insert 8-16 Tpi 3/8 in Ic

Product Description

The SANDVIK COROMANT 5781942 is a laydown threading insert from the CoroThread 266 series, designed for right-hand external threading applications on CNC lathes and turning centers. It is manufactured from solid carbide with a dual PVD coating of TiCrAlN and TiAlN for extended tool life and heat resistance at cutting speed. The insert covers a thread pitch range of 8 to 16 TPI (1.50 to 3.00 mm pitch) and conforms to the 60-degree V thread standard. With a 3/8-inch (9.53 mm) inscribed circle and a C chipbreaker designation, this insert suits precision threading passes in ferrous and non-ferrous materials. It is installed by machinists and CNC operators in production and job-shop environments.

This insert is intended for external threading operations on turned components where a 60-degree V-form thread profile is required. The 8-16 TPI coverage makes it suitable for common unified and metric-equivalent thread families produced on CNC turning equipment. The CoroThread 266 series is engineered for use in dedicated laydown-style threading toolholders that accept the 266 insert geometry. It is a single-tooth insert with a right-hand cutting designation, applicable to standard OD threading cycles in production machining.

Key Features

• Solid carbide substrate with PVD-applied TiCrAlN and TiAlN dual coating for wear and heat resistance
• Covers 8-16 TPI (1.50-3.00 mm pitch) in a single insert, reducing tooling inventory
• 60-degree V thread standard for right-hand external applications
• C chipbreaker geometry for chip control during threading passes
• 3/8-inch (9.53 mm) inscribed circle with 5/32-inch (0.1563 inch) thickness for rigid seating in CoroThread 266 holders
• Corner radius of 0.20 mm (0.0079 inch) for accurate thread root form

Compatibility

Designed for use in CoroThread 266 series laydown threading toolholders that accept the 266RG insert style with a 16 insert size code. Verify holder compatibility with the 266 series insert geometry before installation.

Installation Notes

This insert is installed by qualified machinists or CNC operators. Before changing inserts, confirm the machine spindle is locked out and the turret is fully stopped per OSHA lockout/tagout procedures. Use the correct torque wrench and clamping screw specified for the CoroThread 266 toolholder to seat the insert properly. Do not exceed the toolholder manufacturer's recommended depth-of-cut or feed parameters for threading cycles.