Sandvik Coromant 5742040 Threading Insert Npt 18 Tpi

Product Description

The SANDVIK COROMANT 5742040 is a solid carbide laydown threading insert engineered for right-hand internal NPT thread cutting at 18 threads per inch (TPI). Carrying manufacturer grade 1020 and a PVD-applied TiN coating, this insert is built for threading operations where tool life and surface finish consistency matter. The 60-degree included angle matches the NPT thread form precisely. With a 1/4 inch inscribed circle and 0.125 inch thickness, it seats into compatible T-Max U-Lock toolholders and delivers repeatable thread geometry on internal pipe-thread applications in production and maintenance machining environments.

This insert is suited for machinists and toolroom technicians cutting internal NPT threads in materials where a TiN-coated solid carbide grade performs reliably. Typical applications include threading pipe fittings, manifold ports, and hydraulic block passages in job shop, production floor, and MRO settings. The single-tooth profile per side allows controlled engagement on internal bores. The F chipbreaker designation manages chip flow during threading passes, reducing the risk of chip packing in blind or semi-blind internal thread forms.

Key Features

• Solid carbide substrate with PVD TiN coating for extended wear resistance
• Right-hand internal NPT thread form, 18 TPI with 60-degree included angle
• 1/4 inch inscribed circle fits T-Max U-Lock laydown toolholder style 166
• F chipbreaker geometry controls chip evacuation in internal threading operations
• 0.125 inch thickness provides stable seating in the insert pocket
• Manufacturer catalog reference R166.0L-11NT01F180 1020 for cross-referencing

Compatibility

Designed for use in SANDVIK COROMANT T-Max U-Lock series toolholders accepting style 166 laydown threading inserts with an 11 insert size code. Compatible toolholder and insert seat specifications should be verified against the manufacturer catalog number R166.0L-11NT01F180 1020 prior to installation.

Installation Notes

Threading inserts should be installed by a qualified machinist following the toolholder manufacturer torque and seating guidelines for the specific pocket style. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret or block before swapping inserts. Inspect the insert pocket and clamping components for wear or debris before seating a new insert, as contamination can affect thread accuracy. Handle solid carbide inserts carefully to avoid chipping the cutting edge prior to use.