Scientific Cutting Tools HB240L Helical Boring Bar

Product Description

The SCIENTIFIC CUTTING TOOLS HB240L is a helical boring bar machined from submicron solid carbide for precision internal turning and boring operations. It features a right-hand cutting direction and a minimum bore diameter of 0.24 inches, making it suitable for tight-tolerance work in small-diameter bores. The bright, uncoated finish maintains close dimensional tolerances straight out of the package. Machinists and CNC operators working in production or tool room environments will find this bar well suited to ferrous and non-ferrous applications where rigidity and edge retention are priorities.

This boring bar is designed for use in CNC lathes, turret lathes, and manual turning centers requiring access to small-diameter internal features. With a 7/32-inch shank diameter and a 3-inch overall length, it fits standard boring bar holders and quick-change tooling systems commonly found in precision machining shops. It is particularly appropriate for applications demanding consistent surface finish and dimensional accuracy in bores near the 0.24-inch minimum range.

Key Features

• Submicron solid carbide construction for high rigidity and extended edge life
• Helical geometry supports efficient chip evacuation in small-diameter bores
• Right-hand cutting direction for standard lathe setups
• Bright, uncoated finish - no coating buildup to affect dimensional accuracy
• 0.24-inch minimum bore diameter for access to tight internal features
• 3-inch overall length fits common boring bar toolholders without modification

Compatibility

Designed as an OEM-style replacement or direct tooling addition for standard boring bar holders accepting a 7/32-inch shank diameter in CNC and manual turning applications.

Installation Notes

Installation is performed by qualified machinists following shop tooling procedures. Ensure the machine spindle is fully stopped and the turret or toolholder is secure before seating the bar. Clamp the shank to the manufacturer-specified grip length to minimize overhang and reduce vibration during the cut. Inspect the cutting edge for chips or wear before each use, as carbide tooling can fracture under interrupted cuts if edge integrity is compromised.