Hertel H08704199 Threading Insert 32 Tpi 3/8 in Ic

Product Description

The HERTEL H08704199 is a solid carbide laydown threading insert designed for right-hand external UN threading operations on CNC lathes and turning centers. Manufactured in the 16ER insert style with an HG330TR grade designation, it carries a TiC/TiN coating that improves wear resistance and extends tool life in continuous threading passes. The insert features a 32 threads per inch (TPI) profile, a 3/8 inch inscribed circle (0.3750 inches), and a thickness of 0.1460 inches. It is suited for machinists and toolroom operators running external Unified National thread forms on steel and similar workpiece materials where a durable, coated carbide insert is required.

This insert is applied in external threading operations where UN thread standards are specified. The 16ER style seats into compatible laydown threading toolholders used on manual and CNC lathes in production and job-shop environments. The right-hand orientation and 32 TPI profile make it a direct fit for threading tasks on smaller-diameter workpieces requiring fine Unified National thread pitches. Machinists producing threaded fastener features, fittings, and precision components will find this insert appropriate for medium to high-volume threading passes.

Key Features

• Solid carbide substrate with TiC/TiN coating for wear resistance in external threading
• 16ER insert style for use in standard laydown threading toolholders
• 32 TPI Unified National (UN) thread profile, right-hand external orientation
• 3/8 inch inscribed circle (0.3750 inches) with 0.1460 inch thickness
• Zero-degree relief angle — insert geometry relies on toolholder for clearance
• HG330TR manufacturer grade designation for threading-specific carbide performance

Compatibility

Designed for use in laydown threading toolholders that accept the 16ER insert style. Confirm toolholder seat geometry and insert pocket dimensions before installation. No specific toolholder or machine model compatibility was provided in the product data.

Installation Notes

Threading inserts of this type are seated and clamped by a licensed machinist or qualified toolroom technician familiar with CNC or manual lathe tooling. Always power down and lock out the machine before changing inserts. Use the appropriate torque wrench per toolholder manufacturer specifications when tightening the clamping screw — do not over-tighten. Inspect the insert seat and clamping surfaces for chips or debris before seating a new insert to ensure proper contact and runout control.