Hertel H59869883 Indexable Boring Bar 0.438 in Right Hand

Product Description

The HERTEL H59869883 is a right-hand indexable boring bar designed for precision internal boring operations in metal cutting applications. Built on an HBBQ toolholder style with a 3/8 inch shank diameter and a 5 inch overall length, this bar accepts TPC-style inserts secured by screw clamping for repeatable, rigid insert seating. The minimum bore diameter is 0.438 inches with a maximum bore depth of 1.5 inches. The steel body provides durability under interrupted cuts and continuous roughing passes. Coolant-through capability supports chip evacuation and tool life in deep-bore scenarios. This bar is a single-use, right-hand-cut configuration — not a multi-use toolholder.

This boring bar is suited for CNC lathes, turning centers, and manual engine lathes where small-diameter internal boring is required. With a 0.438 inch minimum bore and 1.5 inch max depth, it fits tight-bore workpieces common in precision machining shops, toolrooms, and production turning environments. Machinists and CNC operators working with ferrous and non-ferrous materials will find the screw-lock insert clamping and coolant-through design practical for both roughing and finishing passes at small bore diameters.

Key Features

• Minimum bore diameter of 0.438 inches suits small internal bore work
• Maximum bore depth of 1.5 inches for short to medium-depth bores
• Right-hand cut orientation for standard lathe and turning center setups
• Screw clamping method locks TPC-style inserts firmly for consistent insert indexing
• Coolant-through design aids chip evacuation and extends tool life in confined bores
• Steel body construction handles roughing and finishing loads at small diameters

Compatibility

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

Installation Notes

This toolholder is installed by a machinist or CNC setup technician. Ensure the machine spindle and chuck are fully stopped and all power is locked out before mounting or changing inserts. Use the appropriate Torx or hex key to tighten the insert clamping screw to the insert manufacturer's recommended procedure — do not overtighten. Confirm shank-to-toolpost or boring bar holder fitment for 3/8 inch shank compatibility before setup.