Osg 15302005 Cobalt Drill Bit Letter N 0.3020 in Tin

Product Description

The OSG 15302005 is a cobalt jobber length drill bit in Letter N size (0.3020 inch / 7.67 mm diameter), finished with a Titanium Nitride (TiN) coating for extended tool life in demanding applications. The bit features a 130-degree split point, a right-hand spiral flute, and a straight-cylindrical shank measuring 3/8 inch in diameter. Overall length is 4-7/8 inches with a flute length of 3-1/16 inches. The R-thinned web and tapered web configuration reduce entry force and improve chip evacuation. This bit is designed for professional machinists and trade technicians working with steel and alloy steel in production or maintenance environments.

The OSG 15302005 is suited for drilling into steel and alloy steel workpieces in blind hole, cross hole, standard drilling, and self-centering applications. It is rated as high performance and carries the OSG Series 1500 designation. The 130-degree point geometry makes it effective on harder ferrous materials where a standard 118-degree point would wear prematurely. It is a common choice in industrial maintenance, fabrication shops, and mechanical trade work where consistent hole tolerance is required.

Key Features

• Letter N size: 0.3020 inch (7.67 mm) diameter with a diameter tolerance of +0 to -0.022 mm
• Cobalt construction with Titanium Nitride (TiN) coating for heat and wear resistance
• 130-degree drill point angle optimized for steel and alloy steel
• R-thinned web with tapered web configuration reduces thrust and improves chip flow
• Right-hand cut, regular spiral, 2-flute design for consistent chip evacuation
• Straight-cylindrical 3/8-inch shank for use in standard drill chucks and collets

Compatibility

Designed for drilling steel and alloy steel workpieces. Suitable for blind hole, cross hole, drilling, and self-centering operations as part of the OSG Series 1500 high-performance cobalt drill line.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotary cutting tools. Secure the shank fully in a compatible chuck or collet before operation. Use appropriate cutting fluid or coolant where recommended by the workpiece material — note this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace the bit when dimensional accuracy or surface finish degrades.