Hertel H59869974 Indexable Boring Bar 5/8 Inch Shank Steel

Product Description

The HERTEL H59869974 is a steel indexable boring bar designed for internal turning and bore finishing operations on CNC lathes and manual turning centers. It features a 5/8 inch shank diameter and an overall length of 4.25 inches, making it suited for tight-tolerance bore work where rigidity and repeatability matter. The tool uses a screw-style insert clamping method and accepts TPC-style inserts, allowing quick indexing without disturbing the setup. Coolant-through capability supports chip evacuation and tool life in deep or interrupted bore applications. Licensed machinists and CNC operators are the primary users of this toolholder style.

This boring bar handles right-hand cut operations with a minimum bore diameter of 0.438 inches and a maximum bore depth of 1.875 inches. The HBBQ toolholder style is a common fit for production turning environments where consistent insert positioning is critical. It is well suited to steel, cast iron, and similar workpiece materials in both job shop and production floor settings where small-bore internal machining is required.

Key Features

• Minimum bore diameter of 0.438 inches supports small-bore internal turning operations
• Maximum bore depth of 1.875 inches for moderate-depth applications
• 5/8 inch shank diameter for secure toolpost or turret mounting
• Screw-style insert clamping for fast, repeatable indexing
• Coolant-through design aids chip control and extends insert life
• Accepts TPC-style inserts for broad insert availability

Compatibility

Designed for use with TPC-style indexable inserts. Follows the HBBQ toolholder style standard. Refer to insert manufacturer cross-reference charts to confirm insert grade and geometry selection for your specific workpiece material.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine before mounting or removing the toolholder from the turret or toolpost. Confirm shank diameter matches the boring bar holder bore before installation, and torque the clamping screws to the machine or toolpost manufacturer specification. Inspect the insert seat and clamping screw condition before each use.