Osg 15199005 Cobalt Jobber Drill Bit No. 8 Tin

Product Description

The OSG 15199005 is a cobalt jobber-length drill bit in No. 8 wire size (0.1990 inches / 5.06 mm diameter), finished with a titanium nitride (TiN) coating for extended tool life. It features a 130-degree split point, a regular spiral flute, and a straight-cylindrical shank sized at 1/4 inch. The R-thinned web reduces thrust and improves chip evacuation. With an overall length of 4-1/4 inches and a flute length of 2-7/16 inches, this bit is built for production-grade drilling in steel and alloy steel. It ships individually and is suited for machine shop, maintenance, and fabrication environments.

This bit is rated for drilling in steel and alloy steel (material code P). Typical applications include blind hole drilling, cross-hole drilling, through-hole drilling, and self-centering operations. The TiN coating adds surface hardness and reduces friction against ferrous workpieces. The 130-degree point angle suits harder materials where a standard 118-degree point would wear prematurely. It is a strong fit for CNC machining centers, drill presses, and manual machines where a 1/4-inch straight shank is the standard interface.

Key Features

• No. 8 wire size: 0.1990 inches (5.06 mm) diameter with a tolerance of +0 to -0.018 mm
• Cobalt high-speed steel construction for heat resistance in steel and alloy steel
• TiN (titanium nitride) coating reduces wear and extends service intervals
• 130-degree drill point angle optimized for harder ferrous materials
• R-thinned web with tapered web configuration lowers entry thrust
• Right-hand cut, regular spiral flute, 2-flute design for efficient chip removal

Compatibility

Designed for use in machines accepting a 1/4-inch straight-cylindrical shank. Primary workpiece materials are steel and alloy steel (ISO material group P). Part of the OSG Series 1500 jobber-length drill line.

Installation Notes

A licensed machinist or qualified maintenance technician should verify chuck or collet concentricity before seating the shank. Secure all workpieces and confirm spindle speed and feed rate are appropriate for the workpiece material before beginning the cut. Do not exceed the rated shank diameter for the chuck or collet being used. Inspect the cutting edges and TiN coating for wear or chipping at regular intervals and replace the bit before dimensional tolerance is compromised.