Osg 8595326 Screw Machine Drill Bit 0.1285in Hss

Product Description

The OSG 8595326 is a screw machine length drill bit designed for high-performance drilling in metal and alloy workpiece materials. Built from high speed steel (HSS) with a coated finish, it features a 130-degree faceted drill point and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation at entry. The straight-cylindrical shank measures 4.00 millimeters in diameter, and the overall length is 50.00 millimeters (approximately 1.97 inches). The two-flute spiral design runs in a right-hand cut direction. This bit is suited for machinists, tool-and-die workers, and maintenance technicians who need a compact, rigid drill for close-tolerance work in tight setups.

The 8595326 is intended for use in drill presses, CNC machining centers, and hand-held power tools where a screw machine length (stub) drill is required for rigidity and precision. The 5xD flute-to-diameter ratio and compact body make it especially practical in fixtures or workpieces with limited clearance. Primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. The wire gauge size corresponds to a No. 30 drill, 0.1285 inches (3.26 mm) in diameter.

Key Features

• High speed steel construction with coated finish for extended tool life in ferrous and non-ferrous materials
• 130-degree faceted drill point reduces walking and improves centering on entry
• Web-thinned, tapered web lowers cutting thrust and aids chip clearance
• Screw machine (stub) length provides added rigidity over jobber-length bits
• Right-hand cut, two-flute spiral configuration with 5xD flute ratio
• Diameter tolerance held to +0 to -0.018 mm for consistent, repeatable hole size

Compatibility

Designed for use with standard drill chucks accepting a straight-cylindrical shank; fits drilling applications requiring a No. 30 wire gauge or 0.1285-inch diameter cutting tool in the OSG Series 1100 product line.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trained technicians following applicable shop safety standards. Secure the shank firmly in a properly sized chuck and verify runout before drilling. Always wear appropriate eye protection and follow machine-specific RPM and feed rate guidelines for the workpiece material. Inspect the cutting edge for wear or chipping before each use and replace when the bit no longer holds tolerance.