Sgs 07351 Circuit Board Drill Bit No. 49 Solid Carbide

Product Description

The SGS 07351 is a solid carbide circuit board drill bit engineered for precision drilling in printed circuit boards and other tight-tolerance applications. It carries a No. 49 wire gauge size with a decimal diameter of 0.073 inches (1.85 mm) and a 130-degree four-facet point that reduces thrust and improves hole entry accuracy. The 1/8-inch (0.125-inch) straight shank fits standard drill chucks and CNC drill spindles. With a regular spiral, 30-degree helix angle, and tapered web, this bit is built for clean, consistent holes. It is manufactured from uncoated solid carbide, which provides the hardness and wear resistance required for demanding materials. Machinists, PCB fabricators, and precision tooling technicians are the primary users.

The SGS 07351 is suited for drilling aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium. Its 0.4-inch (10.16 mm) flute length and 1.5-inch overall length make it practical for circuit board work, prototype fabrication, and precision hole-making in multi-material assemblies. The two-flute design aids chip evacuation in both through-hole and blind-hole drilling scenarios on manual or CNC equipment.

Key Features

• No. 49 wire size, 0.073-inch decimal diameter for precision circuit board hole patterns
• 130-degree four-facet point reduces walking and improves entry accuracy
• Solid carbide construction provides superior hardness and wear resistance versus high-speed steel
• Uncoated finish maintains tight diameter tolerances (-0.0003 to +0.0000 inches)
• 30-degree helix angle and regular spiral promote efficient chip evacuation
• 1/8-inch straight shank is compatible with standard CNC and manual drill chucks

Compatibility

Designed for use with standard 1/8-inch shank drill chucks on CNC drilling machines and manual drill presses used in circuit board fabrication and precision machining applications. Material compatibility includes aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium.

Installation Notes

This bit is intended for use by machinists and PCB fabrication technicians operating CNC or manual drilling equipment. Ensure the workpiece is securely fixtured before drilling to prevent movement at small diameters. Use appropriate spindle speeds and feed rates for the workpiece material - carbide bits require stable, vibration-free setups to avoid chipping. Inspect the cutting edge before each use; solid carbide is hard but brittle and should not be used in hand-held drilling applications.