Hertel H08614786 Indexable Boring Bar 0.347 in Right Hand

Product Description

The HERTEL H08614786 is a right-hand indexable boring bar designed for precision internal turning and boring operations on CNC and manual lathes. Built on a steel shank measuring 5/16 inches in diameter and 4 inches in overall length, it accepts WPGT-style inserts secured by a screw-clamping method. The minimum bore diameter is 0.347 inches, making it well suited for small-diameter internal features requiring consistent, repeatable toolpath control. Coolant-through capability supports chip evacuation and extended insert life during continuous cuts. Licensed machinists and CNC setup technicians are the primary users of this toolholder.

This boring bar is intended for small-bore internal machining applications in precision metalworking environments, including job shops, production machine shops, and tool-and-die operations. The HBBG toolholder style is matched to WPGT insert geometry, allowing machinists to fine-tune cutting angle and depth for finish boring and semi-finish passes. With a maximum bore depth of 1.248 inches and a 5/16-inch shank, this bar fits standard boring bar blocks and quick-change toolposts common to smaller engine lathes and compact CNC turning centers.

Key Features

• Minimum bore diameter of 0.347 inches suits tight internal diameter work
• Right-hand cut orientation for standard lathe spindle direction
• Screw-clamp insert retention ensures rigid, repeatable insert seating
• Coolant-through design aids chip removal and controls cutting zone temperature
• Compatible with WPGT insert style for broad grade and geometry selection
• Steel construction provides strength and vibration damping in the shank body

Compatibility

Designed for use with WPGT indexable inserts. Fits standard 5/16-inch boring bar holders and quick-change toolpost blocks on lathes and CNC turning centers that accommodate this shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician with the machine spindle stopped and locked out per OSHA lockout/tagout procedures. Secure the shank fully in the boring bar holder with minimal overhang to reduce chatter. Verify insert seating and clamp screw torque before resuming spindle operation. Confirm coolant line connection if using the through-coolant feature.