Osg 10144005 Cobalt Hss Screw Machine Drill Bit 0.144 in

Product Description

The OSG 10144005 is a cobalt high speed steel screw machine length drill bit designed for high-performance drilling in steel and alloy steel. It measures 0.144 inches in diameter — equivalent to wire gauge size 27 — with a 130-degree split point and X-thinned web geometry that reduces thrust and improves hole entry accuracy. The overall length is 2-7/16 inches with a 1-inch flute length. Its straight-cylindrical shank seats securely in standard drill chucks and quick-change holders. This bit is intended for machinists, tool-and-die technicians, and metalworking professionals who require consistent, repeatable performance in short-hole drilling applications.

Screw machine length drill bits are shorter and more rigid than jobber-length bits, making them well suited for CNC machining centers, manual drill presses, and turret lathes where minimal deflection is critical. The OSG 10144005 is rated for drilling carbon steel and alloy steel and carries a high performance grade designation within the OSG Series 1000 line. The 2-flute regular spiral design provides efficient chip evacuation in through-hole and blind-hole applications at this diameter range.

Key Features

• Cobalt high speed steel construction for elevated heat resistance during steel and alloy steel drilling
• 130-degree point angle with X-thinned web reduces entry thrust and improves centering
• Screw machine length body delivers increased rigidity and reduced deflection versus jobber-length bits
• 2-flute regular spiral flute design promotes efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Tapered web configuration adds core strength along the full flute length

Compatibility

Designed as an OEM-style screw machine drill bit for use in standard drill chucks and collet systems accepting a straight-cylindrical shank at 0.144 inches diameter; primary workpiece materials are steel and alloy steel.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking tradespeople familiar with speeds and feeds for cobalt tooling in steel applications. Secure the shank fully in the chuck or collet before operation and verify concentricity to minimize runout. Always use appropriate cutting fluid or coolant to extend tool life when drilling steel. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.