Hertel 7000014 Indexable Boring Bar 2.4in Left Hand A-mcln

Product Description

The HERTEL 7000014 is a left-hand A-MCLN style indexable boring bar engineered for precision internal turning and boring operations on machining centers and manual lathes. Built from steel, the bar features a 2.0-inch shank diameter and a 16-inch overall length (OAL), providing the reach and rigidity needed for deep-bore applications. It accepts CN-style inserts secured by screw or clamp, runs a negative rake geometry at a -5-degree lead angle, and includes through-coolant capability via a 1/4-18 NPT coolant port, supporting extended cutting performance and chip evacuation in demanding materials.

This boring bar is suited for industrial machining environments where left-hand boring is required, such as back-boring operations or setups where toolpath direction demands a left-hand holder. The 2.4-inch minimum bore diameter and 1.2810-inch center-to-cutting-edge dimension make it appropriate for medium-to-large bore work on CNC turning centers, horizontal boring mills, and manual lathes. Machinists and tool-and-die professionals specify this holder when through-coolant delivery is critical to tool life and surface finish in long-reach applications.

Key Features

• Left-hand A-MCLN toolholder style for back-boring and left-hand cutting setups
• Through-coolant design with 1/4-18 NPT inlet for improved chip evacuation and insert life
• Accepts CN-style indexable inserts (1/2-inch inscribed circle, 3/16-inch thick) via screw or clamp holding
• Negative rake geometry with -5-degree lead angle for stable cutting on steel and tough alloys
• Steel construction with 2.0-inch shank diameter for high rigidity in deep-bore applications
• 1.2810-inch back-of-bar to cutting edge dimension for predictable setup and offset entry

Compatibility

Designed for use with CN-style indexable inserts with a 1/2-inch inscribed circle and 3/16-inch thickness. Confirm insert geometry and chipbreaker selection against the specific workpiece material and cutting conditions before installation.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholder torque and clamping procedures. Power down and lock out the machine spindle before mounting or removing the boring bar. Verify shank-to-spindle bore fit and confirm coolant line connection to the 1/4-18 NPT port is leak-free before initiating a cut. Insert indexing or replacement should be performed off the machine when possible, using the appropriate torx or hex key per the insert holding hardware.