Scientific Cutting Tools HB300A Helical Boring Bar

Product Description

The SCIENTIFIC CUTTING TOOLS HB300A is a helical boring bar machined from submicron-grade solid carbide and finished with an AlTiN+ coating. It is designed for internal boring operations on machining centers and CNC lathes where precise, small-diameter bores are required. The bar handles a minimum bore diameter of 0.3 inches and a maximum bore depth of 1 inch, with a 0.25-inch shank diameter and an overall length of 2.5 inches. The right-hand cutting direction suits standard spindle configurations. Machinists and tool-and-die professionals install this bar when close-tolerance internal features demand the rigidity and wear resistance that solid carbide provides.

The HB300A is suited for small-bore finishing and semi-finishing passes on ferrous and non-ferrous workpieces in production and job-shop environments. Its compact overall length and 0.25-inch shank make it compatible with standard boring bar holders and quick-change tooling systems used on CNC turning centers and machining centers. The AlTiN+ coating improves heat resistance during high-speed cuts, extending tool life in hardened or abrasive materials. This bar is a single-piece, solid-carbide construction, making it appropriate where tool rigidity and minimal deflection are critical to holding bore tolerances.

Key Features

• Submicron solid carbide construction for high rigidity and minimal deflection in tight-bore applications
• AlTiN+ finish coating improves thermal resistance and extends tool life in abrasive and hardened materials
• Minimum bore diameter of 0.3 inches suits small internal feature requirements
• Maximum bore depth of 1 inch with a 0.25-inch shank diameter for use in standard boring bar holders
• Right-hand cutting direction for compatibility with standard CNC spindle rotation
• Helical boring bar geometry designed to reduce chatter and improve surface finish in internal bores

Compatibility

Designed as an OEM-style replacement and direct-fit boring bar for CNC turning centers and machining centers that accept a 0.25-inch shank boring bar in standard boring bar holders or quick-change tooling systems.

Installation Notes

Installation is performed by qualified machinists following standard toolroom procedures. Secure the shank fully within the boring bar holder to the depth recommended by the holder manufacturer before tightening clamping screws. Power down and lock out the spindle before inserting or removing the bar. Follow applicable ANSI and shop-floor safety standards for cutting tool handling and machine guarding.