Osg 8595249 Screw Machine Drill Bit 0.098 in Hss

Product Description

The OSG 8595249 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. Built from high speed steel with a coated finish, this bit features a 0.098 inch diameter, a 130-degree faceted drill point, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 3.00 millimeters in diameter, and the overall length is 46.00 millimeters (approximately 1.81 inches). Its compact screw machine length provides added rigidity compared to jobber-length bits, making it well suited for close-tolerance drilling on machine tools and drill presses.

This drill bit is intended for use in production machining environments where accuracy and repeatability are required. Its primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. The screw machine length format fits naturally in CNC machining centers, turret lathes, and gang drilling setups where reduced overhang is advantageous. The 2-flute regular spiral design with a 5xD flute-to-diameter ratio supports efficient chip removal across a wide range of these materials. It is sold individually and is part of OSG Series 1100.

Key Features

• 0.098 inch (2.49 mm) diameter with a tight diameter tolerance of +0 to -0.014 mm for close-tolerance work
• 130-degree faceted drill point reduces walking and improves self-centering on entry
• Web-thinned, tapered web lowers thrust requirements when drilling harder materials
• High speed steel construction with a protective coating for extended tool life
• Screw machine length format provides greater rigidity than jobber-length equivalents
• Right-hand cut, 2-flute spiral design compatible with standard drill press and CNC spindle rotation

Compatibility

Suitable for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Fits standard straight-shank drill chucks and collet systems accepting a 3.00 millimeter shank diameter.

Installation Notes

This bit is installed and replaced by machinists and tool-and-die professionals in machine shop environments. Secure the straight-cylindrical shank firmly in a drill chuck or collet before operation and verify runout is within acceptable limits for the application. Always power down and lock out the machine spindle before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material to maximize tool life, noting this bit does not support internal coolant-through delivery.