Osg 8595579 Screw Machine Drill Bit 0.228 in Hss

Product Description

The OSG 8595579 is a screw machine length drill bit designed for high-performance metal drilling in production and maintenance environments. Built from high speed steel with a coated finish, it features a 0.228 inch (wire size No. 1) diameter, a 120-degree faceted drill point, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank and regular spiral flute geometry support consistent, repeatable drilling in demanding applications. Licensed machinists, tool-and-die workers, and industrial maintenance technicians are the primary users of this bit.

This drill bit is suited for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. The screw machine length format — shorter than jobber length — provides added rigidity and reduced deflection, making it a practical choice for drill press, CNC, and turret lathe operations where stub-length control is required. With a flute-by-diameter ratio of 5xD and a 2-flute spiral design, it handles both ferrous and non-ferrous workpiece materials in light to medium stock removal scenarios.

Key Features

• Wire size No. 1 diameter: 0.228 inches (5.79 mm) with a tolerance of +0 to -0.018 mm
• 120-degree faceted drill point with web thinning for reduced entry thrust
• High speed steel construction with coated finish for extended tool life
• Screw machine (stub) length format for increased rigidity and reduced deflection
• Right-hand cut, 2-flute regular spiral geometry for efficient chip clearing
• Compatible with steel, stainless steel, aluminum, and aluminum alloy workpiece materials

Compatibility

The OSG 8595579 is compatible with workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. It is part of OSG Series 1100 and fits standard drill chucks and collets accepting a 6 mm (0.236 inch) straight-cylindrical shank.

Installation Notes

Install this bit in a compatible drill chuck or collet that accepts a straight-cylindrical shank. Secure the shank fully and verify runout before beginning a cut. Apply appropriate cutting fluid for ferrous materials to manage heat and extend tool life. Follow shop safety protocols including eye protection and secure workpiece fixturing before operating.