Scientific Cutting Tools HB240A Helical Boring Bar Carbide

Product Description

The SCIENTIFIC CUTTING TOOLS HB240A is a helical boring bar designed for precision internal boring operations in tight-diameter applications. Built from submicron solid carbide with an AlTiN+ finish coating, this bar delivers superior hardness and wear resistance at elevated cutting temperatures. It handles a minimum bore diameter of 0.24 inches and a maximum bore depth of 1 inch, making it well suited for small-bore work where rigidity and runout control are critical. The right-hand cutting direction is standard for conventional CNC lathe and mill-turn setups. At 0.025 pounds, the bar is lightweight without sacrificing structural integrity in the cut.

This boring bar is used in CNC turning centers, mill-turn machines, and manual lathes wherever small internal diameters must be held to close tolerances. The helical flute geometry improves chip evacuation during deep relative-to-diameter boring passes, reducing the risk of chip packing in confined bores. Machinists and CNC operators working in aerospace, medical, and general precision machining will find this bar appropriate for ferrous and non-ferrous materials where AlTiN+ coating performance is advantageous. The 7/32-inch shank diameter fits standard small-bore toolholders and collet chuck setups.

Key Features

• Submicron solid carbide construction for high hardness and edge retention
• AlTiN+ finish coating provides oxidation resistance and extended tool life at elevated cutting temperatures
• Helical flute geometry promotes efficient chip evacuation in small, deep bores
• Right-hand cut orientation compatible with standard CNC turning and mill-turn configurations
• Minimum bore diameter of 0.24 inches suits tight internal feature work
• Compact 1.5-inch overall length allows use in low-clearance tooling setups

Compatibility

Designed as an OEM-style replacement or direct tooling selection for small-bore internal turning applications requiring a 7/32-inch shank helical boring bar with right-hand cut geometry.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the control is in an e-stop or locked-out state before mounting or removing the bar. Seat the 7/32-inch shank fully into the toolholder or collet to the recommended gauge-length overhang to minimize deflection. Verify runout at the cutting tip with a dial indicator before committing to a finishing pass.