Harvey Tool FBD0781-C3 Flat Bottom Micro Drill Bit 5/64 in

Product Description

The HARVEY TOOL FBD0781-C3 is a solid carbide flat bottom micro drill bit designed for precision drilling applications requiring a 180-degree flat point geometry. With a diameter of 5/64 inches (0.0781 inches decimal), this bit produces flat-bottomed holes without the angled entry left by conventional twist drills. The AlTiN coating provides thermal resistance and wear protection, extending tool life in abrasive and hard materials. At 50 mm overall length with a 13.50 mm flute length and 3.00 mm shank diameter, this bit fits into precision tool holders for miniature and close-tolerance work. Installation is performed by machinists and tool-and-die professionals in CNC or manual drilling operations.

This drill bit belongs to the Miniature High Performance Drills - Flat Bottom Drill series, suited for applications where a flat-bottomed bore is required - including counterbore preparation, optical component mounting holes, sensor pockets, and precision fixturing. The right-hand spiral flute design promotes chip evacuation during drilling. It is appropriate for use in ferrous and non-ferrous materials where tight diameter tolerances and hole-bottom geometry are critical to part function.

Key Features

• 180-degree flat point geometry produces a true flat-bottomed hole without a center cone
• Solid carbide construction provides rigidity and stability in miniature drilling applications
• AlTiN coating improves thermal resistance and extends tool life in hard or abrasive materials
• Right-hand spiral flute promotes chip clearing and reduces heat buildup at the cutting edge
• h6 diameter tolerance on the drill body ensures consistent fit in precision tool holders
• 3.00 mm shank diameter is compatible with standard miniature collet and chuck systems

Compatibility

Designed for use in CNC machining centers, drill presses, and manual mills equipped with collet or chuck systems accepting a 3.00 mm shank diameter. Part of the Miniature High Performance Drills - Flat Bottom Drill series by HARVEY TOOL.

Installation Notes

This drill bit is installed by machinists and precision tooling professionals. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Secure the 3.00 mm shank firmly in a collet or drill chuck rated for the shank size - do not exceed the tool holder's runout tolerance, as micro drill bits are sensitive to misalignment. Follow the tool manufacturer's recommended speeds and feeds for the workpiece material; carbide micro drills are brittle and can fracture if feed rates are excessive or if the tool contacts the workpiece at an angle.