Osg 8595318 Screw Machine Drill Bit 0.125 in Hss

Product Description

The OSG 8595318 is a screw machine length drill bit designed for high-performance drilling in metalworking and industrial fabrication applications. Built from high speed steel with a coated finish, this bit features a 130-degree faceted point angle with web thinning for improved penetration and reduced thrust. The straight-cylindrical shank measures 4.00 millimeters in diameter, and the overall length is 50.00 millimeters (approximately 1.97 inches). With a 2-flute regular spiral configuration and a 5xD flute-to-diameter ratio, it delivers consistent chip evacuation in demanding production environments. Licensed machinists, tool-and-die techs, and fabricators are the primary users.

This drill bit is engineered for use in screw machine operations and short-hole drilling tasks where a compact, rigid tool is required. The 0.125-inch (1/8-inch) diameter places it in the 0.1000 to 0.1500 decimal inch size range. Primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Its tapered web configuration and web-thinned point reduce walking at entry and improve chip flow, making it suitable for both manual drill press setups and CNC machine tool applications.

Key Features

• 0.125-inch (1/8-inch) drill diameter with a tolerance of +0 to -0.018 mm
• 130-degree faceted drill point angle with web thinning for reduced entry thrust
• High speed steel construction with coated finish for wear resistance
• 2-flute regular spiral design with 5xD flute-to-diameter ratio for efficient chip evacuation
• Straight-cylindrical shank for reliable chuck retention
• OSG Series 1100 high-performance grade, no coolant-through required

Compatibility

Designed as a direct-fit screw machine length drill bit for use in standard drill chucks and collet systems accepting a 4.00-millimeter straight-cylindrical shank. Suitable for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces.

Installation Notes

Installation is performed by qualified machinists or tool operators working with drill presses, lathes, or CNC machining centers. Secure the shank fully in the chuck or collet before operation and verify runout before drilling. Always wear appropriate PPE including eye protection when operating rotary cutting tools. Follow the machine manufacturer guidelines and applicable shop safety standards for speeds and feeds when drilling the target material.