Sandvik Coromant 5757653 Threading Insert 4-7 Tpi 1/2 in Ic

Product Description

The SANDVIK COROMANT 5757653 is a solid carbide laydown threading insert engineered for left-hand external threading operations. Part of the CoroThread 266 series, it cuts a 60-degree V thread profile across a 4-7 TPI range, making it suitable for a broad spectrum of external thread forms. The insert carries a TiN coating applied via PVD process, which improves surface hardness and wear resistance during high-cycle threading passes. With a 1/2-inch inscribed circle and a thickness of 0.2190 inches, this insert fits standard 266-series toolholders designed for that IC size. Machinists and CNC lathe operators handling left-hand thread work are the primary users of this insert.

This insert is intended for external threading on CNC lathes and turning centers where left-hand thread geometry is required. The 4-7 TPI cutting range covers coarse thread pitches from 3.50 mm to 6.00 mm, making it applicable to larger-diameter fastener threads, lead screws, and threaded rod stock. The single-tooth-per-side geometry and A chipbreaker designation support controlled chip formation during threading passes. The manufacturer catalog reference for this insert is 266LG-22VM01A001M 1020, and it is sold individually with a minimum order quantity of 10 pieces.

Key Features

• Solid carbide substrate with PVD TiN coating for extended wear life on external threading passes
• Left-hand external 60-degree V thread geometry, 4-7 TPI (3.50-6.00 mm pitch)
• 1/2-inch inscribed circle, compatible with 266-series 22-size laydown toolholders
• A chipbreaker designation for controlled chip formation
• Single tooth per side design with 0.0189-inch corner radius for thread profile accuracy
• CoroThread 266 series insert style with manufacturer grade 1020

Compatibility

Designed for use with SANDVIK COROMANT CoroThread 266 series toolholders accepting a 22-size insert with a 1/2-inch inscribed circle. Specific compatible toolholder models were not provided in the available product data; consult the CoroThread 266 toolholder selection guide to confirm proper seating and clamping compatibility.

Installation Notes

Threading inserts of this type are installed and replaced by qualified machinists or CNC lathe operators following machine lockout and spindle-stop procedures before any insert change. Ensure the toolholder pocket and clamping screw are clean and free of chips before seating the insert. Verify that the insert is fully seated and the clamping torque is applied per the toolholder manufacturer specification. Confirm thread hand and TPI selection in the machine control program before initiating a threading pass.