Hertel H59869123 Indexable Boring Bar 0.3in Bore 1/2in Shank

Product Description

The HERTEL H59869123 is a steel indexable boring bar designed for precision internal boring operations on lathes and turning centers. Built to toolholder style HBBF, it accepts TD-style inserts secured by a screw clamping method, ensuring repeatable insert positioning and rigid cutting performance. The bar features a 1/2-inch shank diameter and a 3-inch overall length, with a minimum bore diameter of 0.3 inches and a maximum bore depth of 0.75 inches. Coolant-through capability supports chip evacuation and tool life in demanding cutting conditions. This tool is intended for right-hand cutting and is used by machinists and tool-and-die professionals in production and job-shop environments.

This boring bar is suited for small-diameter internal boring applications in ferrous and non-ferrous materials where tight tolerances and surface finish requirements are critical. Its compact bore diameter range makes it appropriate for light finishing and semi-finishing passes on workpieces requiring bores starting at 0.3 inches. The screw-retained insert seat allows quick insert indexing without removing the bar from the holder, reducing setup time in high-mix production environments. It is a single-purpose tool and is not configured for multi-use applications.

Key Features

• Minimum bore diameter of 0.3 inches suits small-diameter internal operations
• Maximum bore depth of 0.75 inches for shallow to moderate reach applications
• Screw clamping method provides secure insert retention and consistent tool geometry
• Coolant-through design assists chip removal and extends insert life
• Right-hand cut configuration for standard lathe and turning center setups
• Steel construction offers a balance of rigidity and machinability for the toolholder body

Compatibility

Designed to accept TD-style indexable inserts. Verify insert geometry and grade selection against the specific workpiece material and cutting parameters before use.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholder mounting specifications. Ensure the machine spindle is fully stopped and locked out before mounting or removing the boring bar. Set shank protrusion and overhang to the minimum required to reach bore depth, as excessive overhang increases vibration risk. Follow the insert manufacturer's recommended torque procedure when seating the clamping screw.