M.a. Ford. 30204690 Circuit Board Drill Bit 3/64 in

Product Description

The M.A. FORD. 30204690 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and related electronic assembly work. The bit measures 3/64 inches (0.0469 inches, 1.19 mm) in diameter with a 130-degree drill point angle and a fast spiral geometry that clears chips efficiently in shallow, tight-tolerance holes. The 1/8-inch shank diameter (0.1250 inches, 3.18 mm) fits standard collet chucks used in PCB drilling equipment and benchtop drill presses. Right-hand cutting direction and a tapered web configuration contribute to accurate hole placement and reduced walking on entry.

This bit is suited for drilling cast iron, non-ferrous metals, alloy steel, carbon steel, stainless steel, high-temperature alloys, and titanium, making it useful beyond PCB work in any application requiring small-diameter precision holes. The fast spiral with a 35-degree helix angle promotes material evacuation, which is important in deep-relative-to-diameter holes where chip packing can cause breakage. Typical installers include electronics manufacturing technicians, CNC machine operators, and skilled machinists working with small-format drilling fixtures.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter drilling
• 130-degree drill point angle optimized for circuit board and precision hole entry
• Fast spiral with 35-degree helix angle for efficient chip evacuation
• Tapered web configuration reduces cutting forces and improves hole accuracy
• Right-hand cutting, uncoated finish, 2-flute design
• Diameter tolerance of -0.0003 to +0.0000 inches for tight-tolerance applications

Compatibility

Designed as a Series 302 replacement-style circuit board drill bit compatible with standard 1/8-inch shank collet chucks on PCB drilling machines and precision benchtop drill presses. Suitable for workpiece materials including cast iron, non-ferrous metals, alloy steel, carbon steel, stainless steel, high-temperature alloys, and titanium.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or technicians familiar with small-diameter carbide tooling. Secure the 1/8-inch shank firmly in a matched collet chuck before operation, and verify spindle runout is within acceptable limits to avoid bit breakage. Carbide bits are brittle and require rigid setups with minimal vibration. Always follow machine manufacturer speed and feed recommendations for the workpiece material and bit diameter in use.