Hertel 7000023 Indexable Boring Bar 1.3 in Left Hand

Product Description

The HERTEL 7000023 is a left-hand A-MDUN indexable boring bar engineered for internal turning and precision bore finishing on CNC and manual lathes. Built from steel with a 1-inch shank diameter and 12-inch overall length, it accepts DN.. style inserts secured by screw or clamp and delivers negative rake cutting geometry at a 5-degree rake angle with a -3-degree lead angle. Through-coolant capability via a 1/4-18 NPT coolant port keeps cutting temperatures controlled during extended boring operations. It is a single-use-configuration toolholder designed for consistent, repeatable bore sizing in production and job-shop environments.

This boring bar is suited for shops performing internal diameter work on ferrous and non-ferrous materials where a left-hand orientation is required. With a minimum bore diameter of 1.3 inches, it covers a practical range of medium to larger bore applications. The 0.75-inch center-to-cutting-edge and back-of-bar-to-cutting-edge dimension supports accurate tool positioning within the bore. Machinists and CNC operators in production shops, tool rooms, and contract machining environments are the primary users.

Key Features

• Left-hand A-MDUN toolholder style for internal boring operations
• 1.3-inch minimum bore diameter with 12-inch overall length
• Through-coolant design with 1/4-18 NPT coolant port for thermal management
• Accepts DN.. indexable inserts with 3/8-inch inscribed circle and 3/16-inch thickness
• Negative rake geometry at 5-degree rake angle and -3-degree lead angle
• Screw or clamp insert holding for secure, repeatable insert indexing

Compatibility

Designed for use with DN.. style indexable inserts with a 3/8-inch inscribed circle and 3/16-inch insert thickness in A-MDUN toolholder configurations.

Installation Notes

Installation of indexable boring bars should be performed by a qualified machinist or CNC setup technician. Secure the shank fully within the tool turret or boring head to the recommended overhang per shop standards, minimizing deflection. Before indexing or replacing inserts, ensure the machine is powered down and the spindle is fully stopped. Verify coolant line connection to the 1/4-18 NPT port is leak-free before resuming cutting operations.