Hertel H08695561 Threading Insert 18 Tpi 3/8 Inch Un

Product Description

The HERTEL H08695561 is a laydown-style threading insert designed for external UN thread cutting on CNC lathes and threading toolholders. Built from solid carbide with a TiC/TiN multilayer coating, it cuts right-hand external threads at 18 threads per inch (TPI). The insert features a 3/8-inch inscribed circle (0.3750 inches), a thickness of 0.146 inches, and a 0-degree relief angle. The 16ER insert style seats securely in compatible laydown toolholders. Licensed machinists, CNC operators, and tooling specialists working in production threading applications will find this insert well suited to ferrous and general-purpose threading work where a durable, coated carbide grade is required.

This insert is used in external threading operations on manual lathes and CNC turning centers across job-shop, maintenance, and production environments. The UN thread standard makes it applicable to standard unified national thread profiles common in North American industrial fastener and component manufacturing. The right-hand cutting geometry is appropriate for conventional feed-direction threading passes. Typical applications include threading steel, alloy steel, and similar materials where the HG630TR carbide grade and TiC/TiN coating provide wear resistance and edge retention.

Key Features

• Solid carbide substrate with TiC/TiN multilayer coating for extended tool life
• 16ER insert style seats in standard laydown threading toolholders
• 18 TPI cutting geometry for UN external thread standard
• Right-hand cutting orientation for conventional threading direction
• 3/8-inch inscribed circle with 0.146-inch insert thickness
• 0-degree relief angle suits positive-seat laydown pocket configurations

Compatibility

Designed as an OEM-style replacement or direct-fit insert for laydown threading toolholders accepting the 16ER insert style with a 3/8-inch inscribed circle and 0-degree relief angle seating.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the correct torque wrench and clamp screw specified by the toolholder manufacturer — do not overtighten or substitute fasteners. Inspect the toolholder pocket for wear or debris before seating the insert to ensure proper contact and thread accuracy.