Osg 8608409 Screw Machine Drill Bit 0.161 in Xpm

Product Description

The OSG 8608409 is a screw machine length drill bit designed for high-performance drilling in steel, alloy steel, cast iron, and nickel alloy workpieces. It carries a 0.161 inch (No. 20 wire gauge) diameter, a 130-degree point angle, and an XPM high-performance coating that extends tool life under demanding cutting conditions. The straight-cylindrical shank seats securely in standard drill chucks and machine spindles. With a 2-flute regular spiral configuration and R-thinned, tapered web, this bit is built for machinists, tool-and-die workers, and maintenance technicians who need reliable, repeatable hole quality in hard ferrous materials.

This drill bit is suited for screw machine operations, CNC drilling centers, and bench drill press applications where compact tool length and rigidity matter. Its 3xD flute-to-diameter ratio and screw machine length profile reduce deflection and improve chip evacuation in short, through-hole drilling tasks. It is a practical choice for production environments running steel and cast iron parts where standard jobber-length bits introduce unwanted runout or chatter. The 6.00 mm shank diameter provides a secure, concentric grip in collet or Jacobs-style chuck setups.

Key Features

• 0.161 inch (No. 20 wire gauge, 4.09 mm) cutting diameter with tolerance of +0 to -0.018 mm
• 130-degree standard point angle for reduced thrust and improved self-centering on ferrous materials
• XPM high-performance coating for extended wear resistance in steel and alloy steel
• R-thinned, tapered web reduces cutting resistance and improves chip flow
• Screw machine length (3xD flute ratio) for greater rigidity and reduced deflection
• Right-hand cut, 2-flute spiral design compatible with standard machine tooling setups

Compatibility

Rated for use in steel, alloy steel, cast iron, and nickel alloy workpieces. Part of OSG Series 1900, covering the 0.1500 to 0.2000 inch decimal inch drill bit size range.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool setup. Secure the shank fully in a properly sized collet or drill chuck before operation, and verify spindle runout is within acceptable tolerance for the application. Ensure the machine is at a full stop before changing or inspecting the bit. Follow applicable shop safety standards and machine manufacturer guidelines for feed rate and spindle speed selection based on workpiece material.