Hertel H59869867 Indexable Boring Bar Left Hand Steel

Product Description

The HERTEL H59869867 is a left-hand indexable boring bar designed for precision internal boring operations on metal workpieces. Built on a steel toolholder body with a 3/8-inch shank diameter, this bar accepts TPC-style inserts secured by a screw-style clamping method, providing consistent insert positioning and repeatable cutting performance. It carries a minimum bore diameter of 0.438 inches and a maximum bore depth of 1.5 inches, with an overall length of 5 inches. Coolant-through capability supports chip evacuation and heat control during extended cuts. This tool is typically installed by machinists and toolroom professionals in CNC turning centers and manual lathes.

This boring bar is suited for small-diameter internal turning applications in production and job-shop environments. The left-hand cut orientation makes it appropriate for specific setup configurations where conventional right-hand tooling is not practical. With a 0.438-inch minimum bore diameter, it targets tight-bore work on components such as bushings, sleeves, and hydraulic fittings. The screw-type insert retention and TPC insert compatibility allow for quick insert changes without removing the bar from the holder.

Key Features

• Left-hand cut orientation for dedicated setup requirements
• Minimum bore diameter of 0.438 inches for small-bore internal turning
• Maximum bore depth of 1.5 inches
• Coolant-through design aids chip removal and thermal control
• Screw-style insert clamping for secure, repeatable insert seating
• Compatible with TPC-style indexable inserts

Compatibility

Designed for use with TPC-style indexable inserts. Fits toolholding setups accepting a 3/8-inch shank boring bar in left-hand orientation.

Installation Notes

This boring bar is installed and serviced by qualified machinists. Ensure the machine spindle is fully stopped and the control is in a safe state before changing inserts or adjusting the bar in the holder. Use appropriate insert mounting torque per the insert manufacturer's screw specification, and confirm shank clamping security before cutting. Follow shop safety procedures and applicable machining standards when setting tool reach and overhang.