Hertel H08704272 Threading Insert 32 Tpi 1/4 in Ic Un

Product Description

The HERTEL H08704272 is a solid carbide laydown threading insert designed for internal UN thread applications. Built to insert style 11IR, it cuts right-hand internal threads at 32 threads per inch (TPI) with a 1/4 inch inscribed circle and a thickness of 0.127 inches. The TiC/TiN multilayer coating provides wear resistance and extended tool life in ferrous and non-ferrous materials. This insert is suited for CNC lathes and turning centers where repeatable thread form accuracy is required. Machinists and toolroom technicians install these inserts in compatible boring bars and threading tool holders.

This insert is intended for internal threading operations on standard UN fastener threads at 32 TPI. The 11IR style geometry seats in laydown-style internal threading tool holders. Typical applications include threading bores in hydraulic fittings, pneumatic components, and machined steel or aluminum housings where UN thread standards apply. The right-hand cut orientation is standard for the majority of internal threading work. A relief angle of 0 degrees is specified, consistent with laydown insert seating geometry.

Key Features

• Solid carbide substrate for rigidity and thermal stability in threading cuts
• TiC/TiN coating for improved wear resistance and reduced built-up edge
• 32 TPI for standard UN internal thread profile
• Right-hand cut, 11IR insert style for laydown internal threading holders
• 1/4 inch inscribed circle with 0.127 inch thickness for precise holder fit
• Zero-degree relief angle for full surface contact in laydown seat design

Compatibility

Designed for use in laydown-style internal threading tool holders accepting the 11IR insert style with a 1/4 inch inscribed circle seating diameter.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the tool holder is secured before seating or removing the insert. Use the appropriate torx or clamp screw torque as specified by the tool holder manufacturer — do not over-tighten the clamp screw. Inspect the insert pocket for debris before seating to maintain accurate thread form.