Osg 570028111 Screw Machine Drill Bit 9/32 in Carbide

Product Description

The OSG 570028111 is a solid carbide screw machine length drill bit designed for high-performance drilling in steel, alloy steel, and cast iron. It features a 9/32 inch (7.15 mm) diameter, a 180-degree web-thinned point for precise entry and reduced thrust, and an EgiAs coating that improves wear resistance and tool life. The straight-cylindrical shank measures 0.3125 inches in diameter, and the overall length is 75 mm (approximately 2.95 inches). With a 2xD flute-to-diameter ratio and regular spiral flute geometry, this bit is built for consistent chip evacuation in short-hole drilling applications. It is typically installed by machinists and tool-and-die professionals in CNC and manual drilling operations.

The OSG 570028111 is suited for screw machine and stub-length drilling applications where rigidity and accuracy matter. Its solid carbide construction makes it appropriate for harder workpiece materials including steel, alloy steel, and cast iron. The short overall length reduces deflection, making it well-suited for high-speed spindle work in production environments, job shops, and maintenance machining settings. The 2-flute spiral configuration promotes efficient chip removal during through-hole and blind-hole drilling.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• EgiAs coating improves surface hardness and extends tool life
• 180-degree web-thinned, tapered-web point reduces entry thrust and improves centering
• Screw machine (stub) length design minimizes deflection at high spindle speeds
• Right-hand cut, 2-flute regular spiral for consistent chip evacuation
• Drill bit diameter tolerance of +0 to -0.022 mm for dimensional accuracy

Compatibility

Designed for use in steel, alloy steel, and cast iron workpieces. Fits standard drill chucks and collets accepting a 0.3125-inch straight-cylindrical shank. Part of the OSG Series 5700 screw machine drill line, covering the 0.2500 to 0.3000 decimal inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists familiar with cutting tool setup and spindle speed selection. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Do not exceed the recommended feed and speed parameters for the workpiece material and machine type. Inspect the cutting edges and coating condition before each use and replace the bit if chipping or excessive wear is observed.