Hertel 8000172 Carbide Shim Indexable 3/8 in Itsn

Product Description

The HERTEL 8000172 is a carbide shim designed for indexable tooling systems used in external turning operations. It sits beneath the indexable insert in the tool holder pocket, providing a hardened seating surface that protects the holder body from insert-related wear and impact. The shim measures 0.125 inches thick with a 3/8 inch (0.375 inch) inscribed circle, matching triangle-shaped inserts. Configured in the ITSN shim style with a negative rake and neutral cutting direction, this part is a precision-ground component installed by machinists and tooling technicians in production and job-shop turning environments.

This shim is suited for external turning setups where triangle-shaped negative-rake indexable inserts are used on manual or CNC lathes. It is compatible with the A16RPTFNR11 complete tool holder, making it a direct-fit replacement for that tooling system. The 3/8 inch inscribed circle size is a common designation in general-purpose turning toolholders. Sold individually, with a minimum order quantity of 5 units, making it practical to stock as a consumable maintenance item alongside insert inventory.

Key Features

• Carbide construction provides high hardness and resistance to deformation under cutting loads
• ITSN shim style with negative rake and neutral cutting direction for standard triangle insert seating
• 0.125 inch thickness and 3/8 inch inscribed circle for precise insert pocket fit
• Compatible with A16RPTFNR11 tool holder as a direct OEM-style replacement
• Protects the tool holder pocket from direct insert contact and premature wear
• Sold as single units with a minimum order quantity of 5

Compatibility

Confirmed compatible with the A16RPTFNR11 complete tool holder. Designed for use with triangle-shaped indexable inserts in external turning applications requiring a 3/8 inch inscribed circle ITSN-style shim.

Installation Notes

Installation is performed by a machinist or tooling technician during insert indexing or holder maintenance. Ensure the machine spindle is fully stopped and the machine is placed in a safe lockout state before accessing the tool holder pocket. The shim must seat flat and clean in the pocket before the insert is clamped; inspect the pocket and shim seating surface for chips or debris prior to assembly. Do not reuse a visibly cracked or deformed shim, as a compromised shim can cause insert instability during cutting.