Sgs 07399 Circuit Board Drill Bit 1/8 in Solid Carbide

Product Description

The SGS 07399 is a solid carbide circuit board drill bit designed for high-precision drilling in printed circuit boards and other demanding materials. Built from uncoated solid carbide, it measures 1/8 inch (0.1250 inches) in diameter with a 1-1/2 inch overall length and a 3/8 inch flute length. The 130-degree four facet point geometry reduces thrust and improves hole accuracy at entry. With a 30-degree helix angle and right-hand cut, this bit is suited for machinists, tool and die technicians, and fabricators who require tight tolerances on small-diameter holes. The diameter tolerance runs from -0.0003 to +0.0000 inches, supporting consistent, repeatable results.

The SGS 07399 is used in precision machining applications where small-diameter, high-accuracy holes are required. It is well suited for drilling printed circuit boards, plastics, fiber-reinforced polymers, aluminum, copper alloys, stainless steel, titanium, cobalt alloys, cast iron, and nickel. Typical applications include electronic assembly shops, precision machine shops, and aerospace fabrication environments. The uncoated finish makes it a practical choice for non-ferrous and composite materials where coating buildup or heat transfer is a concern.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter drilling
• 130-degree four facet point reduces walking and improves entry accuracy
• 30-degree helix angle with regular spiral and tapered web for efficient chip evacuation
• Diameter tolerance of -0.0003 to +0.0000 inches for precision fitment
• Right-hand cut, uncoated finish compatible with a broad range of workpiece materials
• Series 105 design with 1/8 inch shank matching the drill diameter for direct chuck mounting

Compatibility

Designed for use with standard drill chucks and CNC drilling spindles accepting a 1/8 inch shank. Suitable for drilling aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium workpieces as specified by the manufacturer.

Installation Notes

This bit is intended for use by machinists and precision fabricators operating drill presses, CNC machines, or hand-held drilling equipment with a compatible 1/8 inch chuck. Secure the shank fully in the chuck before operation and verify spindle speed is appropriate for the workpiece material and bit diameter. Inspect the cutting edges before each use - carbide is brittle and can chip if subjected to side loading or impact. Ensure the workpiece is firmly fixtured to prevent deflection during drilling.