Hertel 8000168 Indexable Shim 3/4 in Irsn External Turning

Product Description

The HERTEL 8000168 is a carbide shim designed for indexable tooling systems used in external turning applications. It features an IRSN shim style with a negative rake and neutral cutting direction, making it suitable for standard OD turning operations where consistent insert seating is required. The shim measures 3/4 inch inscribed circle and 3/16 inch (0.1875 inch) thickness, providing a stable, precision foundation for cylindrical inserts in compatible tool holders. At 0.02 pounds, it is a lightweight component that plays a critical role in maintaining insert alignment and protecting the tool holder pocket from wear and damage. Installation is performed by machinists and tooling technicians as part of routine insert or holder maintenance.

This shim is intended for external turning setups in CNC and manual lathe environments. It is sized for cylindrical insert shapes and works within tooling systems that require a negative rake shim seat. Typical applications include OD roughing and finishing passes where insert security and holder longevity are priorities. The IRSN designation indicates compatibility with specific holder pocket geometries found in production turning operations across light and medium machining environments.

Key Features

• Carbide shim construction for hardness and wear resistance in high-cycle turning applications
• IRSN shim style with negative rake and neutral cutting direction
• 3/4 inch (0.7500 inch) inscribed circle sized for cylindrical indexable inserts
• 3/16 inch (0.1875 inch) thickness provides consistent insert pocket depth
• Designed for external turning tool holder applications

Compatibility

Compatible with tool holder A16RPTFNR11. Designed as an OEM-style replacement shim for indexable external turning holders requiring an IRSN-style carbide shim seat with a 3/4 inch inscribed circle.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before removing or replacing any shim, insert, or holder component. Use the appropriate torque wrench and insert screw per the tool holder manufacturer specifications when reassembling the insert clamping system. Inspect the holder pocket for damage or debris before seating the shim to ensure proper insert support and alignment.