Hertel H08700254 Threading Toolholder Internal Right Hand

Product Description

The HERTEL H08700254 is an indexable threading toolholder designed for internal threading operations on lathes and turning centers. Built to the HSIR series standard, this right-hand toolholder accepts 16IR inserts secured by a screw-clamp holding method, delivering consistent insert registration and repeatable thread form accuracy. The 1-inch shank diameter provides rigid support in standard boring bar holders, while the 8-inch overall length gives adequate reach for most internal threading applications. It is installed and used by machinists and tool-room professionals working in production or job-shop turning environments.

This toolholder is suited for internal threading on CNC and manual lathes where a minimum bore diameter of 1.16 inches is achievable. The HSIR-1000-8-16 style designation identifies the shank size, length, and insert compatibility in a single reference. It is appropriate for threading applications in steel, stainless, aluminum, and other machinable materials depending on insert grade selection. This tool is not configured for coolant-through delivery and is intended as a single-purpose threading toolholder, not a multi-use bar.

Key Features

• Internal right-hand threading configuration in HSIR series
• 1-inch shank diameter for standard boring bar block or block-style holder mounting
• 8-inch overall length provides reach for deep-bore threading setups
• Accepts 16IR indexable inserts with 3/8-inch inscribed circle via screw-clamp retention
• Minimum bore diameter of 1.16 inches and center-to-cutting-edge dimension of 0.65 inches
• Neck diameter matches shank at 1 inch, maintaining consistent clearance geometry

Compatibility

Designed for use with 16IR series indexable threading inserts with a 3/8-inch inscribed circle. Fits standard 1-inch shank boring bar holders on CNC turning centers and manual lathes.

Installation Notes

A licensed machinist or qualified tool-room technician should install this toolholder following the machine tool manufacturer's setup procedures. Ensure the lathe or turning center is fully powered down and the spindle is locked before mounting or removing the toolholder. Torque the insert clamping screw to the insert manufacturer's recommended specification using the appropriate Torx or hex key. Verify tool centerline height and radial alignment before taking threading passes.