Sandvik Coromant 5757913 Threading Insert 12-24 Tpi

Product Description

The SANDVIK COROMANT 5757913 is a laydown threading insert engineered for precision external thread cutting on CNC lathes and turning centers. Part of the CoroThread 266 series, it is manufactured from solid carbide with a PVD-applied TiAlN and TiCrAlN dual coating for improved wear resistance and tool life at elevated cutting temperatures. The insert cuts right-hand external 60-degree V threads across a range of 12 to 24 threads per inch (TPI), with a corresponding metric pitch range of 1.00 to 2.00 mm. With an inscribed circle of 3/8 inches and a thickness of 5/32 inches, this insert is sized for standard CoroThread 266 holders. Machinists and CNC operators working in job shop, production, and contract manufacturing environments are the primary users.

This insert is suited for external threading operations on ferrous and non-ferrous materials where a unified 60-degree V thread form is required. It covers the commonly used 12-24 TPI range, making it applicable to general-purpose fastener threads and precision mechanical components. The A-style chipbreaker geometry supports efficient chip evacuation in threading cycles. The PVD coating process preserves sharp cutting edges, which is critical for thread form accuracy. This insert is sold individually with a minimum order quantity of 10 units per order.

Key Features

• Solid carbide substrate with PVD TiAlN and TiCrAlN dual-layer coating for extended tool life
• Right-hand external 60-degree V thread form, 12-24 TPI (1.00-2.00 mm pitch)
• CoroThread 266 series geometry with A-style chipbreaker for controlled chip flow
• 3/8 inch (9.53 mm) inscribed circle and 5/32 inch (3.97 mm) thickness for CoroThread 266 holders
• Corner radius of 0.0051 inches (0.13 mm) for precise thread root form
• Hole diameter of 0.1732 inches (4.40 mm) for secure clamping in compatible toolholders

Compatibility

Designed for use with SANDVIK COROMANT CoroThread 266 series threading toolholders that accept the 266 insert style with a 16 size code. Verify holder compatibility using the manufacturer catalog number 266RG-16VM01A001M 1125 before ordering.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing or seating inserts. Use the manufacturer-specified torque tool and clamping screw to secure the insert - do not overtighten by hand. Inspect the insert seat and clamping pocket for chips or debris before seating a new insert to ensure proper contact and thread form accuracy.