Sgs 51109 Jobber Drill Bit 9/64 in Solid Carbide 118 Deg

Product Description

The SGS 51109 is a jobber-length drill bit designed for precision drilling in metalworking, machining, and fabrication applications. Built from micrograin solid carbide, it delivers superior hardness and wear resistance compared to high-speed steel alternatives. The bit measures 9/64 inches (0.1406 inches decimal) in diameter with a 2-1/2 inch overall length and a 1-3/8 inch flute length. A 118-degree faceted point angle and web-thinned, tapered web geometry reduce thrust and improve centering on entry. The bright uncoated finish is suitable for dry cutting or use with standard cutting fluids.

This drill bit is suited for precision hole-making in steel, cast iron, aluminum, and similar materials in machine shop, tool-and-die, and production environments. The straight-cylindrical shank fits standard 3-jaw drill chucks and collet holders. It is commonly used in CNC machining centers, drill presses, and manual lathes where tight diameter tolerances are required. The 5xD flute-to-diameter ratio provides adequate chip evacuation for typical jobber-length drilling depths.

Key Features

• Micrograin solid carbide construction for extended tool life in hard and abrasive materials
• 118-degree faceted drill point with web-thinned, tapered web for reduced entry thrust and improved self-centering
• Regular spiral, 2-flute design promotes efficient chip clearing
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Diameter tolerance of -0.0005 to 0.0000 inches for consistent, close-tolerance hole sizing
• Conforms to DIN 338 standard for jobber-length drill geometry

Compatibility

Designed as an OEM-style jobber-length drill bit conforming to DIN 338 geometry, suitable for use in standard drill chucks and collet holders accepting a 0.1406-inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or tool-and-die professionals familiar with carbide tooling. Carbide drill bits are brittle compared to high-speed steel — avoid side loading, interrupted cuts without proper setup, or dropping the bit, as chipping or fracture can result. Ensure the workpiece is securely clamped and the spindle is properly aligned before drilling. Follow applicable shop safety standards and equipment manufacturer guidelines for spindle speed and feed rate selection.