Hertel 16ERZ18NPTHG330 Threading Insert 18 Tpi Npt Carbide

Product Description

The HERTEL 16ERZ18NPTHG330 is a solid carbide laydown threading insert designed for external NPT thread cutting at 18 threads per inch (TPI). Built to the 16ER insert style, it features a TiAlN coating applied via PVD process, which improves wear resistance and tool life during interrupted or continuous threading passes. The inscribed circle measures 3/8 inch (0.3750 inch decimal), and the insert thickness is 0.1614 inch (4.10 mm). Designed for right-hand thread cutting, this insert suits CNC lathe and turning center operators working with NPT pipe thread profiles on steel, stainless, and similar materials.

This insert is used in external NPT threading applications on CNC turning centers and lathes where a repeatable, accurate pipe thread form is required. NPT threads are a tapered standard common in plumbing, HVAC, and industrial piping connections. The HG330TR grade and TiAlN PVD coating make this insert a capable choice for medium to high production threading runs where surface finish and thread accuracy are priorities. Machinists and toolroom operators in job shops, pipe fabrication, and OEM production environments are the primary users.

Key Features

• Solid carbide construction for rigidity and wear resistance
• TiAlN PVD coating extends cutting life and reduces built-up edge
• 16ER insert style with right-hand external NPT thread form
• 18 TPI for standard NPT pipe thread cutting
• 3/8 inch (0.3750 inch) inscribed circle for compatibility with matching toolholders
• HG330TR manufacturer grade suited for threading ferrous and alloy materials

Compatibility

Designed as an OEM-style laydown threading insert for 16ER-style toolholders configured for external NPT threading applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator following the toolholder manufacturer guidelines for laydown insert seating and clamping torque. Ensure the machine spindle is fully stopped and the tool turret is in a safe position before changing inserts. Verify insert orientation and seating in the pocket before engaging the workpiece. Follow applicable shop safety protocols and machine guarding requirements when operating threading cycles.