Hertel H59869255 Indexable Boring Bar 0.275 in Solid Carbide

Product Description

The HERTEL H59869255 is a solid carbide indexable boring bar designed for precision internal turning and boring operations on CNC lathes and manual turning centers. Built to toolholder style HBBF, it accepts TD-style inserts secured by a screw-clamp holding method for consistent, repeatable positioning. The bar features a 3/16 inch shank diameter, a minimum bore diameter of 0.275 inches, and a maximum bore depth of 1.875 inches. At 6 inches overall length and machined from solid carbide, it delivers the rigidity needed for tight-tolerance bores in small-diameter work. Coolant-through capability helps manage chip evacuation and heat in deep-bore applications.

This boring bar is suited for machining shops running small-diameter internal features in production or job-shop environments. The right-hand cut orientation makes it compatible with standard spindle-forward turning operations. It is a single-use toolholder configuration, not a multi-use tool, making it appropriate where dedicated bore geometry is preferred. Machinists and CNC operators working with small-bore components in aerospace, medical, or general precision machining will find this bar fits common light-duty boring requirements.

Key Features

• Solid carbide construction for maximum rigidity in small-diameter boring
• Coolant-through design aids chip evacuation and thermal control in deep bores
• Screw-clamp insert holding method for secure, repeatable insert indexing
• Right-hand cut orientation for standard spindle-forward turning setups
• Accepts TD-style indexable inserts for flexible grade and geometry selection
• HBBF toolholder style with 0.275 inch minimum bore diameter

Compatibility

Designed for use with TD-style indexable inserts. Compatible with toolholding systems and turrets that accept a 3/16 inch round shank boring bar.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the turret is in a safe index position before mounting or changing the boring bar. Secure the shank firmly in the toolholder to the depth recommended by your machine tool manufacturer to prevent chatter or pullout during cutting. Follow the insert manufacturer torque guidance when tightening the screw-clamp to avoid damaging the insert pocket.