Osg 8595645 Screw Machine Drill Bit 0.2539 in Hss

Product Description

The OSG 8595645 is a screw machine length drill bit designed for high-performance drilling in metalworking applications. Built from high speed steel with a coated finish, this bit features a 120-degree faceted drill point, web-thinned tip, and a two-flute spiral configuration for efficient chip evacuation. The straight-cylindrical shank measures 8.00 millimeters in diameter and seats securely in standard drill chucks and CNC tool holders. At 75.00 millimeters overall length, the screw machine format provides a compact, rigid profile suited for accurate, high-feed drilling where longer bits would introduce deflection.

This drill bit is built for production and maintenance drilling in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The regular spiral flute geometry and web-thinned point reduce entry force and heat buildup during drilling cycles. It is well suited for machine shop environments, job shops, and industrial maintenance operations where consistent hole quality and tool life are priorities. The Series 1100 designation identifies it within the OSG standard high-performance screw machine line.

Key Features

• 0.2539 inches (6.45 mm) cutting diameter with a tolerance of +0 to -0.022 mm for precise hole sizing
• 120-degree faceted drill point with web thinning for reduced thrust and accurate self-centering
• Two-flute regular spiral geometry promotes efficient chip removal in both ferrous and non-ferrous materials
• High speed steel construction with coated finish for extended wear resistance
• Screw machine length (75.00 mm overall) delivers rigid, low-deflection performance in tight setups
• Right-hand cut, tapered web configuration compatible with standard CNC and manual drilling equipment

Compatibility

Designed as an OEM-style replacement and standard production drill for use in manual drill presses, CNC machining centers, and turret lathes accepting straight-cylindrical shank tooling. Primary workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate as specified in the product data.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tool and die technicians familiar with cutting tool setup and machine operation. Secure the straight-cylindrical shank fully in a collet, drill chuck, or hydraulic holder rated for the shank diameter before operation. Inspect the cutting edges for wear or chipping before each use and replace when the coated surface shows significant breakdown or hole quality degrades. Always follow machine manufacturer guidelines for feed rate and spindle speed when drilling the specified workpiece materials.