Osg 8691010 Carbide Screw Machine Drill Bit 0.3976 in

Product Description

The OSG 8691010 is a solid carbide screw machine length drill bit designed for high-precision, short-hole drilling in production and maintenance environments. Built to Series 6500 standards, it features a 0.3976 inch (10.10 mm) cutting diameter, a 140-degree split point, and an EgiAs coating for extended tool life and reduced heat buildup. The X-thinned web reduces thrust force at entry, and the 2-flute spiral geometry evacuates chips efficiently. Coolant-through capability makes it well suited for harder materials and high-cycle applications. Machinists, tool-and-die tradespeople, and CNC operators are the primary users.

This stub-length drill bit is used in screw machine operations, CNC machining centers, and manual drill press setups where a shorter flute length provides greater rigidity and improved hole accuracy. It is appropriate for ferrous and non-ferrous materials in both light manufacturing and heavy production settings. The straight-cylindrical shank seats directly into standard drill chucks and collet holders without adapters, making it a practical choice for fast changeovers on production lines.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding materials
• EgiAs finish reduces friction and extends tool life in high-cycle use
• 140-degree split point for self-centering entry and reduced thrust
• X-thinned web lowers axial cutting force at the drill tip
• Coolant-through design supports internal coolant delivery for deep or hard-material drilling
• 2-flute spiral geometry promotes efficient chip evacuation

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in any machine setup accepting a straight-cylindrical shank drill in the 0.3500 to 0.4000 inch (9.50 to 11.00 mm) diameter range.

Installation Notes

Installation and operation should be performed by qualified machinists or CNC technicians familiar with rotating cutting tool safety. Confirm that the machine spindle, chuck, or collet is fully powered down and locked out before loading or removing the bit. Verify shank seating and runout before beginning a cut. Follow the machine tool manufacturer guidelines for feed rate and spindle speed appropriate to the workpiece material.