Sandvik Coromant 5758075 Threading Insert 4 Tpi 1/2 in Ic

Product Description

The SANDVIK COROMANT 5758075 is a laydown threading insert designed for internal UN thread cutting on CNC lathes and turning centers. Built from solid carbide with a PVD-applied TiN coating, this insert delivers consistent thread geometry and wear resistance in demanding production environments. It carries a 60-degree included angle, cuts at 4 threads per inch (TPI), and is sized with a 1/2-inch (12.70 mm) inscribed circle. The 1020 manufacturer grade and CoroThread 266 series designation make this a recognized option for machinists running right-hand internal threading operations where dimensional accuracy and surface finish are critical.

This insert is suited for right-hand internal UN thread applications in ferrous and common engineering materials where a TiN-coated solid carbide grade is appropriate. The CoroThread 266 insert style is used in threading toolholders designed around the 266 system. Typical applications include threading bores in production machining of couplings, fittings, and mechanical components requiring standard UN thread profiles at 4 TPI. Machinists in precision job shops and production facilities are the primary users of this insert type.

Key Features

• Solid carbide substrate with PVD TiN coating for wear resistance and consistent performance
• Right-hand internal UN thread profile with 60-degree included angle
• 4 TPI cutting specification for coarse unified national thread applications
• 1/2-inch (12.70 mm) inscribed circle, insert size code 22
• 0.2190-inch (5.56 mm) thickness for stable seating in compatible toolholders
• Chipbreaker style A for controlled chip formation in internal threading

Compatibility

Designed for use in SANDVIK COROMANT CoroThread 266 series internal threading toolholders that accept insert style 266, size code 22, with a 0.2244-inch (5.70 mm) hole diameter. Confirm toolholder specifications before ordering.

Installation Notes

Installation of threading inserts should be performed by a qualified machinist with the machine powered down and the spindle locked. Use the correct torque driver specified by the toolholder manufacturer when seating the insert screw to avoid cracking the carbide substrate. Inspect the insert pocket and clamping surfaces for chips or debris before seating a new insert. Always verify thread profile and pitch against part drawing requirements before beginning a threading pass.