Sandvik Coromant 5742066 Threading Insert 18 Tpi Un

Product Description

The SANDVIK COROMANT 5742066 is a laydown threading insert designed for right hand internal UN thread cutting operations. Built from solid carbide with a PVD-applied TiN coating, this insert delivers consistent thread form at 18 threads per inch with a 60-degree included angle. It features a 1/4 inch (6.35 mm) inscribed circle and a thickness of 1/8 inch (0.1250 inch decimal). Part of the T-Max U-Lock series, the 5742066 carries the manufacturer grade designation 1020 and is intended for precision threading in CNC turning applications. Licensed machinists and CNC operators working in production or job-shop environments are the primary installers.

This insert is suited for internal UN thread applications on lathes and turning centers where consistent thread profile and tool life are required. The laydown style and U-Lock seating design provide stable clamping during threading passes. Typical applications include threading bores in ferrous and non-ferrous workpieces across aerospace, automotive, and general machining environments. Insert size code is 11, and the catalog reference number is R166.0L-11UN01-180 1020.

Key Features

• Solid carbide substrate with PVD TiN coating for wear resistance on internal threading operations
• Right hand cut, 18 TPI, 60-degree included angle for standard UN thread form
• 1/4 inch inscribed circle and 1/8 inch thickness — insert size code 11
• T-Max U-Lock series seating for rigid, repeatable insert positioning
• Single tooth per side geometry with A-style chipbreaker
• Manufacturer grade 1020 with PVD coating process for consistent tool life

Compatibility

Designed for use in SANDVIK COROMANT T-Max U-Lock series threading toolholders accepting size 11 laydown inserts with R166.0L designation. Verify toolholder compatibility with catalog reference R166.0L-11UN01-180 before installation.

Installation Notes

Insert seating and clamping should be performed by a qualified machinist following the toolholder manufacturer torque and clamping procedures. Power down and lock out the machine spindle before changing inserts. Inspect the toolholder pocket and clamping screw for wear or debris before seating a new insert. Do not exceed the recommended depth of cut or feed rate for the insert grade and workpiece material combination.