Sandvik Coromant 5757950 Threading Insert Acme 4 Tpi

Product Description

The SANDVIK COROMANT 5757950 is a solid carbide laydown threading insert designed for cutting internal Acme threads in a right-hand orientation. Part of the CoroThread 266 series, this insert carries a TiN coating applied via PVD process, providing surface hardness and wear resistance suited for threading operations in production and job-shop environments. It is sized at a 1/2 inch (12.70 mm) inscribed circle with a thickness of 0.2190 inches (5.56 mm). The insert operates at 4 threads per inch (TPI) and features a 60-degree included angle with a single tooth per side and an F chipbreaker geometry. It is installed and changed by machinists and CNC tooling technicians on lathes and threading centers.

This insert is intended for internal Acme thread applications requiring a right-hand cut. It fits toolholders and boring bars compatible with the CoroThread 266 insert style, size code 22, and is applicable in both production turning and repair threading scenarios. The Acme thread form is commonly used in power transmission components such as lead screws and linear actuators, making this insert relevant in both manufacturing and maintenance machine shop settings. Manufacturer grade 1020 indicates the carbide substrate and coating combination targeted for this thread form and material class.

Key Features

• Solid carbide substrate with PVD-applied TiN coating for wear resistance
• Right-hand internal Acme thread geometry at 4 TPI with 60-degree included angle
• CoroThread 266 series insert style, size code 22
• F chipbreaker for chip control during internal threading passes
• 1/2 inch inscribed circle with 0.2244 inch hole diameter for secure clamping
• Single tooth per side configuration for precise thread form generation

Compatibility

Designed for use with CoroThread 266 series toolholders and boring bar bodies accepting a size 22 insert with a 1/2 inch inscribed circle in right-hand internal configurations. Refer to SANDVIK COROMANT CoroThread 266 toolholder selection guides for confirmed holder compatibility.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist with the machine fully powered down and spindle locked. Use the appropriate torque wrench and SANDVIK COROMANT clamping hardware specified for the CoroThread 266 toolholder to secure the insert without over-torquing the clamping screw. Inspect the insert seat for chips or debris before seating the new insert. Follow shop safety procedures and machine manufacturer guidelines when setting tool offsets after insert change.