Osg 15246005 Cobalt Drill Bit Letter D 0.2460 Inch Tin

Product Description

The OSG 15246005 is a cobalt jobber length drill bit sized to Letter D (0.2460 inches / 6.25 mm), designed for high-performance drilling in steel and alloy steel. The bit features a titanium nitride (TiN) coating that extends tool life by reducing friction and heat buildup at the cutting edge. The 130-degree split point promotes self-centering and reduces walking on entry, making it well suited for production drilling where accuracy and repeatability matter. With a regular spiral flute and R-thinned web, the 15246005 is engineered for efficient chip evacuation in ferrous materials.

This drill bit is intended for use in blind hole, cross hole, and through-hole drilling applications across industrial, maintenance, and fabrication environments. The straight-cylindrical shank measures 1/4 inch in diameter, allowing it to seat in standard drill chucks and quick-change holders. Right-hand cut geometry is compatible with conventional drill press and hand drill operation. The OSG Series 1500 is positioned for professionals who require consistent, repeatable results when drilling steel and alloy steel components in shop or field settings.

Key Features

• Letter D size: 0.2460 inches (6.25 mm) diameter
• Cobalt construction with TiN coating for extended tool life in ferrous materials
• 130-degree drill point angle with R-thinned web for self-centering entry
• Regular spiral flute with 2-flute configuration for efficient chip evacuation
• Right-hand cut, straight-cylindrical shank for standard chuck compatibility
• Diameter tolerance of +0 to -0.022 mm for consistent sizing

Compatibility

Designed for drilling steel and alloy steel workpieces; suitable for blind hole, cross hole, general drilling, and self-centering applications using standard drill chucks and quick-change holders that accept a 1/4 inch straight shank.

Installation Notes

This bit is installed by a machinist, maintenance technician, or fabricator using a drill press, magnetic drill, or hand drill with a compatible chuck. Secure the shank fully in the chuck before operation and verify runout is within acceptable limits. Use appropriate cutting fluid or coolant when drilling ferrous materials to manage heat, even though coolant-through is not supported by this tool. Inspect the cutting edge for wear or chipping before each use and replace when diameter tolerance can no longer be maintained.