Hertel 16ERZ14WHG225TR Threading Insert Whitworth 14 Tpi

Product Description

The HERTEL 16ERZ14WHG225TR is a laydown threading insert designed for external Whitworth thread turning operations on CNC lathes and turning centers. Made from solid carbide with a PVD-applied TiAlN coating, this insert delivers thermal resistance and edge hardness for threading in steel, stainless steel, and similar materials. It is configured for right-hand cutting and produces Whitworth-standard thread forms at 14 threads per inch (TPI). The 16ER insert style seats in standard laydown threading toolholders. Thickness is 0.1614 inches (4.10 mm), and the inscribed circle measures 3/8 inch (0.3750 inches). This insert is used by machinists and toolroom technicians in production and job-shop environments.

This insert is suited for external threading passes on workpieces requiring British Standard Whitworth (BSW) thread forms. At 14 TPI, it is appropriate for larger Whitworth fastener profiles commonly encountered in maintenance, repair, and legacy equipment manufacturing. The solid carbide substrate and TiAlN finish make it a viable choice for interrupted cuts and moderate-to-high cutting speeds where high-speed steel tooling would degrade quickly. It is sold individually per package, with a minimum order quantity of 10 pieces.

Key Features

• Solid carbide substrate for rigidity and wear resistance in threading applications
• PVD TiAlN coating provides thermal protection and extended tool life
• Right-hand external cut geometry for standard Whitworth threading passes
• 14 TPI thread form matches British Standard Whitworth profiles
• 16ER laydown insert style fits compatible indexable threading toolholders
• Inscribed circle of 3/8 inch (0.3750 inches) with 4.10 mm thickness

Compatibility

Designed for use in 16ER-style laydown indexable threading toolholders. The manufacturer catalog number is listed as 16ER Z 14 Whitworth. Confirm toolholder pocket geometry and seating style before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine before indexing or replacing inserts. Use the correct torx or clamp screw driver to seat the insert fully and evenly in the pocket — do not overtighten. Verify thread form and TPI match the workpiece specification before beginning the threading cycle.