Hertel 7000438 Indexable Boring Bar Left Hand Through Coolant

Product Description

The HERTEL 7000438 is a left-hand indexable boring bar designed for internal boring operations on CNC lathes and turning centers. Built to the A10SCLPL2 toolholder style in the A-series, it features a 5/8-inch shank diameter and a 10-inch overall length, making it well suited for reaching into deep bores while maintaining rigidity. The bar is constructed from steel and accepts CP.. 21.51 series inserts secured by screw clamping. Through-coolant capability is supported via a 1/8-27 NPT coolant hole, allowing direct coolant delivery to the cutting edge for improved chip evacuation and tool life in demanding materials.

This boring bar is intended for precision internal diameter work in production and job-shop turning environments. It handles a minimum bore diameter of 0.77 inches and a maximum bore depth of 1.875 inches, making it appropriate for short, tight-tolerance bores. The minimum bore diameter is reduced to 0.25 inches when used with a diamond insert cartridge configuration. It is installed and set up by machinists and CNC operators working to close bore tolerances on lathes equipped with tool turrets or block-style holders.

Key Features

• Left-hand cutting orientation for applications requiring reverse-spindle or back-boring setups
• Through-coolant design with 1/8-27 NPT coolant port for direct cutting-zone cooling and chip control
• Accepts CP.. 21.51 series inserts held by screw clamping for repeatable indexing
• Steel construction provides durability and vibration damping in standard boring applications
• Back of bar to cutting edge measures 0.406 inches, enabling precise tool offset setup
• Minimum bore diameter reduces to 0.25 inches with diamond insert cartridge configuration

Compatibility

Designed for use with CP.. 21.51 series indexable inserts in A10SCLPL2 toolholder-compatible setups. Fits standard 5/8-inch bore tool blocks and turret stations on CNC turning equipment.

Installation Notes

This boring bar is installed and adjusted by machinists or CNC setup technicians. Power down and lock out the machine spindle before changing inserts or setting tool offsets. Ensure the shank is fully seated and clamped to the specified overhang to minimize deflection. Connect the coolant port to the machine through-coolant supply using the 1/8-27 NPT thread; verify coolant pressure and flow before running production parts.