Sandvik Coromant 5742068 Threading Insert 20 Tpi 1/4 in Ic

Product Description

The SANDVIK COROMANT 5742068 is a solid carbide laydown threading insert designed for right-hand internal UN thread cutting at 20 threads per inch (TPI). Part of the T-Max U-Lock series, it carries a PVD-applied TiN coating that extends tool life on ferrous and nonferrous materials. The insert features a 1/4-inch (6.35 mm) inscribed circle, a 60-degree included angle, and a 0.125-inch thickness, making it a precision ground component suited for CNC lathe and turning center threading operations. Catalog reference R166.0L-11UN01-200 in grade 1020. Installation and selection are handled by machining professionals and tooling specialists.

This insert is applied in production and job-shop environments where accurate UN-standard internal threads are required. Typical applications include threading bores in hydraulic fittings, valve bodies, and mechanical fastener components on CNC turning equipment. The single-tooth-per-side geometry and A-style chipbreaker support controlled chip flow during internal threading passes. Insert size code 11 and the 166-series toolholder system define the seat and clamping interface. This insert is sold individually but carries a minimum order quantity of 10 units per purchase transaction.

Key Features

• Solid carbide substrate, grade 1020, with PVD TiN coating for wear resistance
• Right-hand internal UN thread form, 60-degree included angle, 20 TPI
• 1/4-inch inscribed circle (6.35 mm); 0.125-inch thickness (3.17 mm)
• A-style chipbreaker for consistent chip control in internal threading
• T-Max U-Lock series, insert size code 11, compatible with 166-series toolholders
• Hole diameter 0.110 inches (2.80 mm) for secure U-Lock clamping

Compatibility

Designed for use with SANDVIK COROMANT T-Max U-Lock series 166-style internal threading toolholders that accept size code 11 inserts. Catalog number R166.0L-11UN01-200 1020 is the manufacturer reference for toolholder seat matching.

Installation Notes

Insert seating and replacement should be performed by a qualified machinist or tooling technician with the machine in a full stop and lockout-tagout state. Use the appropriate T-Max U-Lock clamping screw and torque driver per the toolholder manufacturer guidelines. Inspect the insert seat and clamping pad for chips or debris before seating a new insert. Do not regrind or recoat PVD-coated solid carbide inserts in the field.