Osg 8595491 Screw Machine Drill Bit 0.1935 in Hss

Product Description

The OSG 8595491 is a screw machine length drill bit designed for fast, accurate hole-making in metalworking applications. Built from high speed steel with a coated finish, it measures 0.1935 inches (Wire Size 10, 4.91 mm) in diameter with a straight-cylindrical shank. The 120-degree faceted point and web-thinned, tapered web geometry reduce entry force and improve centering on hard materials. Two spiral flutes clear chips efficiently during operation. Overall length is approximately 2.76 inches (70 mm) with a flute length of approximately 1.02 inches (26 mm) and a shank diameter of approximately 0.24 inches (6 mm). This bit is rated for high performance service and carries a diameter tolerance of +0 to -0.018 mm. It is sold individually and suited for production drilling environments where a compact, rigid drill is required.

This bit is well suited for drilling steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate in precision machining and fabrication settings. The screw machine length profile provides added rigidity compared to jobber length bits, making it a preferred choice on drill presses, CNC machining centers, and manual lathes where stub-length rigidity reduces deflection. The 5xD flute-to-diameter ratio supports deeper cuts relative to the compact body. Machinists, tool and die technicians, and metal fabricators will find this bit appropriate for production runs and repetitive hole operations.

Key Features

• Wire Size 10 (0.1935 inches, 4.91 mm) diameter with tight tolerance: +0 to -0.018 mm
• 120-degree faceted drill point with web-thinned, tapered web for reduced thrust and accurate entry
• High speed steel construction with coated finish for extended tool life on steel and aluminum
• Screw machine (stub) length body delivers greater rigidity and less deflection than jobber length bits
• Two spiral flutes with regular helix for consistent chip evacuation
• Right-hand cut, straight-cylindrical shank compatible with standard drill chucks and collets
• No coolant-through requirement — suitable for conventional dry or flood-coolant setups

Compatibility

Designed for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. Fits standard drill chucks and collets accepting a 6 mm (approximately 0.24 inches) straight-cylindrical shank. Part of the OSG Series 1100 high performance screw machine drill line.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or metalworking tradespeople familiar with cutting tool setup and machine operation. Secure the shank fully in the chuck or collet and verify runout before beginning a cut. Always bring the spindle to a full stop before changing tooling or clearing chips. Follow applicable shop safety procedures and machine manufacturer guidelines for speed and feed selection based on workpiece material.