Osg 8595077 Screw Machine Drill Bit 0.0303 in Hss

Product Description

The OSG 8595077 is a screw machine length drill bit designed for precision drilling in metalworking and machining applications. With a 0.0303 inch (0.77 mm) diameter and a 150-degree faceted drill point, it delivers clean entry into ferrous and non-ferrous workpieces. The high speed steel (HSS) construction with a coated finish provides heat resistance and extended cutting life. The web-thinned, tapered web design reduces cutting forces and improves chip evacuation. This bit belongs to the OSG Series 1100, built to high performance grade standards for demanding production environments. It is installed by machinists and tool-and-die professionals using standard drill presses, CNC machines, or hand drilling equipment.

This screw machine length drill bit is suited for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. The shorter overall length of 38.00 mm (approximately 1.5 inches) compared to jobber-length bits provides greater rigidity and reduced deflection, making it a reliable choice for high-precision, close-tolerance bores in production machining and shop environments. Right-hand cut spiral flutes facilitate consistent chip removal during through-hole and blind-hole operations.

Key Features

• 0.0303 inch (0.77 mm) diameter with diameter tolerance of +0 to -0.014 mm for precision fitment
• 150-degree faceted drill point for positive engagement and reduced walking on hard materials
• High speed steel construction with coated finish for heat resistance and extended tool life
• Web-thinned, tapered web reduces thrust and improves chip flow
• Screw machine length (38.00 mm overall) delivers increased rigidity over jobber-length bits
• 2-flute regular spiral design with 5xD flute-to-diameter ratio for efficient chip evacuation

Compatibility

Designed as a replacement or production drill bit for metalworking applications involving steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Part of the OSG Series 1100 high performance drill bit line.

Installation Notes

Install this bit in a compatible collet, drill chuck, or tool holder rated for the 3.00 mm straight-cylindrical shank diameter. Verify spindle runout before use, as excessive runout on small-diameter bits increases breakage risk. Power down all equipment completely before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.