Hertel 16ERZ20UNHG225T Threading Insert 20 Tpi 3/8 Inch

Product Description

The HERTEL 16ERZ20UNHG225T is a laydown-style threading insert designed for external UN thread forms at 20 threads per inch (TPI). Constructed from solid carbide and finished with a PVD-applied TiAlN coating, this insert delivers high wear resistance and thermal stability during single-point threading operations on CNC lathes and turning centers. The 16ER insert style seats in a laydown orientation, providing rigid support and repeatable positioning. With a 3/8 inch (0.3750 inch) inscribed circle and a thickness of 0.1614 inch (4.10 mm), it fits standard 16ER toolholders used in precision machining environments. This insert is used by machinists and CNC operators working with UN-standard threaded components.

This insert is suited for right-hand external threading of UN-standard threads at 20 TPI on a variety of workpiece materials. The TiAlN PVD coating makes it effective on steels, stainless steels, and high-temperature alloys where heat and abrasion resistance are critical. It is commonly used in job shops, production machining cells, and toolroom operations where consistent thread quality and insert life are priorities. Sold individually with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate for rigidity and wear resistance in threading applications
• TiAlN PVD coating provides thermal stability and extended tool life
• 20 TPI UN external thread form for standard unified thread production
• Right-hand cutting orientation for conventional external threading passes
• 3/8 inch inscribed circle, 0.1614 inch thickness fits 16ER laydown toolholders
• 16ER insert style for laydown seating and secure, repeatable indexing

Compatibility

Designed for use in standard 16ER laydown threading toolholders compatible with the 16ER insert style. Verify toolholder pocket geometry and seating requirements before installation.

Installation Notes

Installation of threading inserts should be performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and insert screw to seat the insert securely without over-tightening the clamping screw. Inspect the toolholder pocket for wear or debris before seating a new insert to ensure proper contact and thread accuracy.