Hertel H08614760 Indexable Boring Bar 0.285 in Min Bore

Product Description

The HERTEL H08614760 is a steel indexable boring bar designed for precision internal turning and boring operations on CNC lathes and manual turning centers. Built to the HBBG toolholder style, it accepts WPGT inserts secured by a screw-clamp holding method, delivering repeatable insert positioning for tight-tolerance bore work. The bar has a minimum bore diameter of 0.285 inches and a shank diameter of 0.25 inches, making it well-suited for small-diameter internal machining. Coolant-through capability supports chip evacuation and tool life in deep-bore applications. Machinists and toolroom technicians working in job shops, production facilities, or maintenance operations will find this bar a reliable right-hand-cut solution for ferrous and non-ferrous materials.

This boring bar is intended for right-hand cutting applications requiring access to bores as small as 0.285 inches in diameter, with a maximum bore depth of 1.0 inch. The 0.25 inch shank mounts in standard quarter-inch boring bar holders and quick-change tooling systems commonly found on CNC and manual lathes. It is suited for production runs and prototype work where consistent insert indexing and coolant delivery are priorities. No secondary boring head is required for typical shallow-bore applications within the rated depth.

Key Features

• HBBG toolholder style with screw-clamp insert retention for secure, repeatable indexing
• Compatible with WPGT inserts, a widely available insert geometry for internal boring
• Coolant-through design aids chip removal and extends insert life in deep or difficult bores
• Right-hand cut configuration for standard CNC lathe and manual turning setups
• Steel construction provides rigidity in the 0.25 inch shank diameter class
• Compact 4.0 inch overall length suits close-clearance turret and gang-tool setups

Compatibility

Accepts WPGT style inserts. Shank diameter of 0.25 inches fits standard quarter-inch boring bar pockets and quick-change holders. MSC and manufacturer reference number HBBG-S250R/L3-4.0-.285 may be used for cross-reference purposes.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the lathe or turning center is powered down and in a safe state before mounting or removing the boring bar. Secure the shank fully within the toolholder pocket to the recommended engagement depth and verify insert seating and screw torque before initiating a cut. Refer to the insert manufacturer specifications and your machine tool manual for feed, speed, and depth-of-cut parameters appropriate to the workpiece material.