Osg HP255-1299 Solid Carbide Jobber Drill Bit 3.3 Mm

Product Description

The OSG HP255-1299 is a solid carbide jobber-length drill bit engineered for high-performance drilling in steel, alloy steel, and cast iron. It measures 3.3 mm in diameter with an overall length of 66 mm and a flute length of 28 mm. The 140-degree point angle with R-thinned web geometry promotes self-centering entry and reduces thrust load. WD1 coating adds wear resistance for extended tool life in ferrous materials. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. This bit is suited for blind hole, cross hole, and through-hole drilling operations in production and maintenance environments.

The HP255-1299 is designed for use in CNC machining centers, drill presses, and handheld power tools where precise, repeatable hole quality in steel and cast iron is required. The 5xD flute-to-diameter ratio and regular spiral geometry support efficient chip evacuation in moderate-depth holes. Coolant-through capability makes it compatible with machines equipped with through-spindle coolant delivery, extending tool life in higher-volume applications. Machinists and tool-and-die professionals working with ferrous workpiece materials will find this bit a reliable general-purpose and production option.

Key Features

• Solid carbide construction for rigidity and heat resistance in ferrous materials
• WD1 coating for enhanced wear resistance and extended tool life
• 140-degree R-thinned point for self-centering entry and reduced thrust
• Coolant-through design compatible with through-spindle coolant systems
• Straight-cylindrical shank fits standard chucks and collet holders
• Regular spiral, 2-flute geometry promotes consistent chip evacuation

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces. Primary workpiece material codes P and K. Suitable for blind hole, cross hole, standard drilling, and self-centering applications.

Installation Notes

Installation and tool changes should be performed with the machine fully de-energized and the spindle at a complete stop. Verify shank diameter seating in the collet or chuck before operation. Follow machine manufacturer guidelines for feed rate and spindle speed when drilling ferrous materials. Secure workpieces properly before drilling to prevent movement and tool breakage.