Hertel H59868166 Indexable Boring Bar Right Hand 3/8 in Shank

Product Description

The HERTEL H59868166 is a steel indexable boring bar designed for internal turning and bore finishing operations on CNC lathes and manual turning centers. Built to the HBBC toolholder style, it accepts CD-style inserts secured by a screw-clamp holding method, providing repeatable insert positioning and reliable cutting performance. The bar features a 3/8-inch shank diameter and an overall length of 2.5 inches, making it suited for compact tooling setups. It supports a minimum bore diameter of 0.208 inches and a maximum bore depth of 0.5 inches. Coolant-through capability helps evacuate chips and manage heat at the cutting zone, extending insert life in continuous or interrupted bore applications.

This boring bar is used in precision machining environments where small-diameter internal bores require consistent dimensional accuracy. It is a right-hand cut tool, intended for conventional lathe rotation and standard bore entry orientations. Typical applications include finish boring, light roughing, and feature preparation in small-diameter workpieces across production and job-shop settings. Machinists and CNC operators working with ferrous and non-ferrous materials will find the steel body and screw-clamp insert system well suited to stable, low-vibration setups in tight bore geometries.

Key Features

• HBBC toolholder style with screw-clamp insert retention for secure, repeatable seating
• Accepts CD-style indexable inserts for flexible cutting geometry options
• Minimum bore diameter of 0.208 inches enables work in tight, small-diameter bores
• Maximum bore depth of 0.5 inches suits shallow to moderate internal features
• Coolant-through design directs fluid to the cutting zone for chip control and heat management
• Right-hand cut orientation for standard lathe and CNC turning center setups

Compatibility

Designed to accept CD-style indexable inserts. Verify insert geometry and nose radius against job requirements before installation. No specific machine model compatibility was provided by the manufacturer for this part.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully stopped and the tool turret or holder is locked out before mounting or changing the boring bar. Secure the shank in a compatible 3/8-inch boring bar holder or turret block, confirming full engagement and proper overhang to minimize deflection. Follow the insert manufacturer torque guidance for the clamping screw and inspect the insert seat for chips or debris before seating a new insert.