Sgs 07285 Circuit Board Drill Bit Wire 78 Solid Carbide

Product Description

The SGS 07285 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit boards and other small-diameter applications requiring tight tolerances. Sized at wire gauge 78 (0.0160 inches decimal, 0.41 mm), this bit features a 130-degree four-facet point geometry that reduces walking and improves hole entry accuracy. The uncoated solid carbide construction delivers the rigidity and edge retention needed when drilling hard or abrasive materials. With a 1.5-inch overall length and a 0.125-inch (1/8-inch) shank, it is compatible with standard collet and chuck setups common in CNC drilling and precision hand operations.

This bit is suited for electronics manufacturing, prototyping, and repair work where small, accurate through-holes are required in rigid or semi-rigid substrates. The two-flute regular spiral design with a 30-degree helix angle promotes chip evacuation during drilling. Approved material applications include aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium, making it a versatile option for machine shops, electronics technicians, and fabricators working across a range of substrate types.

Key Features

• Wire size 78 (0.0160 inches / 0.41 mm) for micro-diameter precision drilling
• 130-degree four-facet point reduces walking and improves entry accuracy
• Solid carbide construction for rigidity and edge retention in hard materials
• Uncoated finish suitable for a wide range of workpiece materials
• 1/8-inch shank diameter fits standard collets and small drill chucks
• Two-flute regular spiral with tapered web for efficient chip removal

Compatibility

Designed for use with materials including aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium. Compatible with any drill press, CNC machine, or hand tool accepting a 0.125-inch (1/8-inch) round shank.

Installation Notes

Secure the 1/8-inch shank fully in the collet or chuck before operating to prevent runout. Use appropriate spindle speeds for the workpiece material and bit diameter - micro-diameter carbide bits are brittle and prone to breakage if feed rates are excessive or lateral force is applied. Ensure the workpiece is firmly fixtured to prevent movement during drilling. Inspect the cutting edge before each use; carbide bits at this diameter should be replaced rather than resharpened when worn.