Osg 859514511 Screw Machine Drill Bit 0.0571 in Hss

Product Description

The OSG 859514511 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. With a 0.0571-inch (1.45 mm) diameter, a 140-degree four-facet point, and a high speed steel construction, this bit delivers precise, clean entry holes in a compact stub-length format. The two-flute spiral design with web thinning reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 3.00 mm (approximately 0.118 inches) in diameter, making it compatible with standard drill chucks and collet systems. Machinists and tool-and-die professionals working on small-diameter bore requirements will find this a reliable production option.

This drill bit is built for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Its screw machine length format — shorter than a jobber bit — increases rigidity and reduces deflection, making it well suited for CNC machining centers, drill presses, and manual turret lathes where stub-length tooling is preferred. The 5xD flute-to-diameter ratio supports consistent chip clearance across the full drilling depth. It is appropriate for both production floor use and precision repair work where small-diameter accuracy is critical.

Key Features

• 0.0571-inch (1.45 mm) diameter with tolerance of +0 to -0.014 mm for precision fitment
• 140-degree four-facet point reduces walking and improves entry accuracy on hard materials
• Web-thinned, tapered web construction lowers cutting thrust on small-diameter bores
• Screw machine (stub) length increases rigidity and minimizes deflection versus jobber-length bits
• Two spiral flutes with regular spiral type for efficient chip evacuation
• Right-hand cut with coated high speed steel for extended tool life in steel and aluminum

Compatibility

Designed for use in standard drill chucks and collet systems accepting a 3.00 mm straight-cylindrical shank. Suitable for primary workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Part of the OSG Series 1100 screw machine length drill line.

Installation Notes

Install in a properly sized collet or drill chuck rated for the shank diameter before use. Secure the workpiece firmly to prevent movement during drilling. Verify spindle speed and feed rate are appropriate for the workpiece material and bit diameter before starting the cut. Inspect the cutting edges for wear or chipping before each use, as small-diameter bits are susceptible to breakage if run at incorrect parameters.